Qualitatively how is the molar solubility of Ca(OH)2 affected by the presence of CaCl2 in the solution?
Common-Ion Effect:
Consider the equilibrium ionization of a sparingly soluble salt, MX:
MX(s)⇌M+(aq)+X−(aq)
If another salt containing either of the ions M+ or X- (called the common ion) is added to the solution, then by Le Chatelier's principle, the increase in concentration of the common ion will shift the equilibrium to the left, toward the formation of the undissolved salt, MX, thus lowering its solubility.
This illustrates the common-ion effect: The solubility of a sparingly soluble ionic salt is reduced by the addition of another solute that gives a common ion.

\(\\ \tt\hookrightarrow C_{15}H_{32}+23O_2\longrightarrow 15CO_2+16H_2O\)

\(\\ \tt\hookrightarrow CO_2+CaO=CaCO_3\)

1) The balanced equation for the combustion of C15H32 (pentadecane) is:

C15H32 + 23O2 → 15CO2 + 16H2O

2) To test for the presence of carbon dioxide (CO2) in the products of the combustion of C15H32, one simple way is to bubble the gas through limewater (aqueous calcium hydroxide solution). When carbon dioxide is passed through limewater, it reacts with the calcium hydroxide to form a white precipitate of calcium carbonate according to the following chemical equation:

Ca(OH)2 + CO2 → CaCO3 + H2O

The formation of a white precipitate indicates the presence of carbon dioxide in the gas. Another way to test for the presence of carbon dioxide is to use a pH indicator, such as universal indicator or litmus paper. When carbon dioxide dissolves in water, it forms a weak acid called carbonic acid. This can be detected by observing a change in the color of the pH indicator. Carbon dioxide will turn universal indicator yellow or litmus paper red, indicating an acidic solution.

Answer:

4.14516129 g/mL

Explanation:

The density can be found with the following formula.

\(d= \frac{m}{v}\)

where \(m\) is the mass and \(v\) is the volume.

We know the mass is 25.7 grams. We must find the volume.

The volume is equal to the volume of water that is displaced. Subtract the initial volume from the final volume.

⇒ final volume - initial volume

The initial volume is 35.5 mL and the final volume is 41.7 mL.

⇒ 41.7 mL - 35.5 mL

⇒ 6.2 mL

The volume of the aluminum piece is 6.2 mL.

Now we know the mass and the volume.

\(m= 25.7 g\\v=6.2 mL\)

Substitute the values into the formula.

\(d=\frac{m}{v}\)

\(d=\frac{25.7 g}{6.2 mL}\)

\(d=4.14516129 g/mL\)

The density of the aluminum sample is 4.14516129 g/mL

A scientific law is different from a scientific theory because it describes something in nature without attempting to explain it, this statement is true.

A scientific law foretells the outcomes of particular beginning circumstances. It may tell you what color hair your unborn kid would have or how far a baseball will go when fired at a specific angle.In contrast, a theory seeks to offer the best plausible justification for why events take place the way they do.

A scientific law often describes an observable phenomena. It doesn't explain the phenomenon's existence or its origins. A scientific theory is the explanation for a phenomena. It is untrue that with enough study, hypotheses become laws.

Thus, a scientific law is different from a scientific theory because it describes something in nature without attempting to explain it, this statement is true.

To learn more about difference between scientific theory and scientific  law follow the link;

https://brainly.com/question/1308851

#SPJ1

The compounds ranked by their expected lattice energy from greatest to least are: MgF_2, MgCl_2, MgBr_2, MgI_2.

Lattice energy is a measure of the energy released when gaseous ions come together to form an ionic solid. It is influenced by factors such as ion charge and ion size. In general, as the charges of the ions increase, the lattice energy also increases. However, when comparing ions with the same charge, the size of the ions becomes the determining factor.

In the given compounds, the common ion is Mg_2+ (with a +2 charge), while the anions are F-, Cl-, Br-, and I-. Among these anions, fluoride (F-) has the smallest ionic radius, followed by chloride (Cl-), bromide (Br-), and iodide (I-). Smaller ions have a higher charge density, meaning the positive charge is concentrated in a smaller space, leading to stronger attractive forces between the ions.

Therefore, based on ion size, the compound with the greatest expected lattice energy is MgF_2, followed by MgCl_2, MgBr_2, and MgI_2, with MgF_2 having the strongest bond and MgI_2 having the weakest bond.

Learn more about lattice energy from the given link:

https://brainly.com/question/29735933

#SPJ11

Explanation:

density = mass/volume

density = 89.6/10

density = 8.96g/cm³

The ionic compounds that produce negative hydroxide (OH−) ions when dissolved in water are called bases. A compound containing negative nonmetal ion as well as a positive metal ion that is held together by the ionic bond is called an ionic compound.

But what are ions? Ions are atoms which become charged particles as a result of losing or gaining electrons. NaOH (sodium hydroxide) is an example of a base. When it dissolves in water, it generates negative hydroxide (OH−) ions and positive sodium (Na+) ions. It can be represented by the following equation:

                                         NaOH →H2O + OH− + Na+

Examples of bases are sodium hydroxide, calcium carbonate and potassium oxide.

A base is a substance that can neutralize the acid by reacting with hydrogen ions. Most bases are minerals that react with acids to form water and salts. Bases include the oxides, hydroxides and carbonates of metals.

The soluble bases are called alkalis. Sodium hydroxide is an alkali. Copper(ll) oxide is insoluble in water, so it is a base but not an alkali. Therefore, All alkalis are bases, but not all bases are alkalis. Bases have a slippery feel and taste bitter. Bases are defined as proton (H+) acceptors. Common examples of bases include metal oxides and metal hydroxides and ammonium hydroxide

PROPERTIES↓

In the chemical properties of acids and bases, we now focus on bases.

Uses of Bases

1. Calcium Hydroxide (Slaked lime) [Ca(OH)2]

2. Magnesium Hydroxide (Milk of magnesia) [Mg(OH)2]

3. Sodium Hydroxide (Caustic soda) (NaOH)

↓For more information search the link below↓

https://byjus.com/chemistry/propertries-of-acids-and-bases/

https://www.aplustopper.com/the-uses-of-bases/

#carryonlearning

Answer:

C.

Explanation:

Answer A is incorrect because a compound doesn't have to be made with only metals.

Answer B is incorrect because that is actually the definition of a pure element.

Answer C is correct because to make a compound, there has to be a chemical reaction where bonds are formed and an entirely new substance is created.

Answer D is incorrect because compounds cannot be separated by physical means.

Hope this helps :D

Answer:

water molecules

Explanation:

Osmosis is the movement of water molecules from a solution of higher concentration to a solution of lower concentration.

Hope it helps..

B. Ammonia cannot form an amide from a carboxylic acid at room temperature because it will act as a base instead of attacking the carbonyl carbon.

This is because ammonia has a lone pair of electrons on its nitrogen atom, which makes it more basic than the carboxylic acid. As a result, it will react with the carboxylic acid to form its conjugate acid and an anion. This reaction is known as acid-base reaction and does not lead to the formation of an amide.

the reason why ammonia cannot form an amide from a carboxylic acid at room temperature is due to its basic nature, which causes it to act as a base instead of attacking the carbonyl carbon. This explanation helps to clarify the specific mechanism involved in this reaction and highlights the importance of understanding the properties of different chemical compounds in organic chemistry.


Ammonia (NH3) is a weak base, and carboxylic acids (RCOOH) are weak acids. At room temperature, the reaction between ammonia and a carboxylic acid would result in the formation of an ammonium salt (RCOO- NH4+) rather than an amide (RCONH2). This is because ammonia prefers to act as a base and abstract a proton (H+) from the carboxylic acid instead of acting as a nucleophile and attacking the carbonyl carbon (C=O) of the acid.

In order to form an amide from a carboxylic acid and ammonia, you would typically need to heat the reaction or use other conditions that promote amide formation. At room temperature, ammonia will primarily act as a base and not a nucleophile, thus forming an ammonium salt rather than an amide.

To know more about carboxylic acid, visit

https://brainly.com/question/31050542

#SPJ11

Answer:

False

Explanation:

Quantitative data is measured using numbers and Qualitative data is descriptive

The United States uses many different energy sources and technologies to generate electricity. The sources and technologies have changed over time, and some are used more than others.

The three major categories of energy for electricity generation are fossil fuels (coal, natural gas, and petroleum), nuclear energy, and renewable energy sources. Most electricity is generated with steam turbines using fossil fuels, nuclear, biomass, geothermal, and solar thermal energy. Other major electricity generation technologies include gas turbines, hydro turbines, wind turbines, and solar photovoltaics.

Natural gas was the largest source—about 38%—of U.S. electricity generation in 2021. Natural gas is used in steam turbines and gas turbines to generate electricity.

Coal was the second-largest energy source for U.S. electricity generation in 2021—about 22%. Nearly all coal-fired power plants use steam turbines. A few coal-fired power plants convert coal to gas for use in a gas turbine to generate electricity.

Petroleum was the source of less than 1% of U.S. electricity generation in 2021. Residual fuel oil and petroleum coke are used in steam turbines. Distillate—or diesel—fuel oil is used in diesel-engine generators. Residual fuel oil and distillates can also be burned in gas turbines.

For more information on electricity generation click on the link below:

https://brainly.com/question/12475693

#SPJ4

The option that can lead to deviations from Beer's law at constant path length is option A.

Using monochromatic radiation All radiation that was not absorbed by his sample when stray light reaches the detector is transmitted to the detector.

All of the above factors can lead to deviations from Beer's Law if the path length is constant. Optical pathlength refers to the distance that light travels through a sample and is usually kept constant in spectrophotometric experiments in order to accurately measure the sample's absorbance.

Therefore, unless monochromatic radiation is used, the absorbance of the sample may not accurately reflect the concentration of the solute, as different wavelengths of light may be absorbed differently.

For more information on Beer's Law kindly visit to

https://brainly.com/question/18591932

#SPJ4

Answer:

he distance to a star can be found by comparing its luminosity to its apparent brightness.

Explanation: A star that is far away will be very dim compared to its luminosity. So it proves that  the ratio of its luminosity to apparent brightness will be greater than for a nearby star.

Answer:

Nervous System

Explanation:

They work together

when a compound donates (loses) electrons, that compound becomes Oxidized. such a compound is often referred to as an electron donor.

when a compound accepts (gains) electrons, that compound becomes Reduced. such a compound is often referred to as an electron acceptor.

in glycolysis, the carbon-containing compound that functions as the electron donor is Glucose.

once the electron donor in glycolysis gives up its electrons, it is oxidized to a compound called Pyruvate

5. NAD⁺ is the compound that functions as the electron acceptor in glycolysis.

6. the reduced form of the electron acceptor in glycolysis is NADH

A substance is said to be oxidized when it loses electrons, loses hydrogen, or receives oxygen.

However, the opposite happens with reduction. In other words, when a substance gains electrons, gains hydrogen, or loses oxygen, it is said to be reduced.

A substance that itself is reduced to oxidize another substance is called an oxidizing agent. Redox reactions occur simultaneously. That is, when one substance is oxidized, only another substance is reduced.

During glycolysis, the six-carbon compound glucose (C6H12O6) loses electrons and is finally converted to a three-carbon compound known as pyruvate (CH3COCOOH). In this process, an oxidant called NAD+ receives electrons and is itself reduced to NADH.

The chemical formula for glucose is C6H12O6, while the chemical formula for pyruvate is CH3COCOOH. Looking at their chemical formulas, it is easy to see that glucose has lost hydrogen compared to pyruvate. That means that glucose has been oxidized. Glucose has 12 hydrogens for 6 carbons, but pyruvate has only 4 hydrogens for 3 carbons. This means that glucose was oxidized in the process because the molecule produced, pyruvate, has relatively few hydrogens.

learn more about glucose oxidation at https://brainly.com/question/24542799

#SPJ4

The digital signal is a signal that encodes data as a series of discrete values; at any one moment, it can only take on a maximum of one of a finite set of values.

A digital signal, in contrast, represents continuous values; it always reflects a real number within a continuous range of values. Information is represented by simple digital signals in discrete analogue level bands. The same information state is represented by all levels in a band of values. The signal in the majority of digital circuits can have two legitimate possible values; this is known as a binary signal or logic signal.

Learn more about Digital Signal here

https://brainly.com/question/14825566

#SPJ4

They give us the balanced equation of the reaction. Now, we need to know the moles of HIO3 present in the solution that they describe to us. We are given the molarity and volume of the solution, so the moles will be:

Now, we will find the moles of HCl that will be needed to react 0.24mol of HIO3. We see the stoichiometry of the reaction. The ratio HCl to HIO3 is 5/1. So, the moles of HCl that we need is:

They ask us about the volume of the solution, we have the molarity and the moles. So, the volume will be:

To react completely with 150 mL of 1.6 M HIO3 solution are needed 1.0 of 1.2M solution of HCl .

So, the answer will be the last option: 1.0L

The correct answer is option C

c) 6.0 moles

What is Combination Reaction?

We look forward to the outcomes of pleasant activities like putting furniture together and mixing materials to produce something wonderful. By itself, each element is not that fascinating. But if we combine all these distinct parts, we may create something more intricate and fascinating.

Similar to this, you may mix two or more reactants to create a new product in chemical processes. This reaction falls within the category of a combination reaction, often known as a synthesis reaction.

1 mole of calcium chloride = 111g

Therefore 222g of CaCl2 is equivalent to 2 moles of CaCl2

Since 1 formula unit CaCl2 gives 3 ions,

therefore, 1 mol of CaCl2 will give 3  moles of ions  2 moles of CaCl2 would give 3×2

=6 moles of ions.

Learn more about Combination Reaction from given link

https://brainly.com/question/15092182

#SPJ4

The answer is A. The element is sodium (Na) and is highly reactive

I The answer is 42 cubic cm

The expressions proposed for the partial molar properties of the binary mixture, Mˉ1 and Mˉ2, are given as:

Mˉ1 = M1 + Ax2

Mˉ2 = M2 + Ax1

where A is a constant and x1, x2 represent the mole fractions of the components in the mixture.

These expressions are not correct and cannot represent the true partial molar properties of a binary mixture.

In a binary mixture, the partial molar properties represent the change in a specific property of a component when an infinitesimal amount of that component is added to the mixture, while keeping the overall composition constant. The partial molar properties are typically defined as derivatives of the mixture's thermodynamic properties with respect to the mole fractions.

The proposed expressions do not conform to the fundamental principles of partial molar properties. According to these expressions, the partial molar property of a component (Mˉ1 or Mˉ2) is equal to the pure component property (M1 or M2) plus a term involving the mole fraction of the other component (Ax2 or Ax1). This form does not align with the definition of partial molar properties and their behavior in a binary mixture.

In reality, the partial molar properties are determined by the interactions between the components in the mixture, as well as the thermodynamic behavior of the system. These interactions are not captured by the proposed expressions, which assume a linear relationship between the partial molar properties and the mole fractions.

Therefore, the proposed expressions for the partial molar properties cannot be considered correct. To accurately describe the partial molar properties of a binary mixture, more sophisticated models and equations, such as activity coefficients or equations of state, need to be employed.

To know more about molar properties click this link -

brainly.com/question/31030794

#SPJ11

Answer:

108 g

Explanation:

2H₂ + O₂ ⇒ 2H₂O

1) n(H₂) : n(H₂O) = 2 : 2

Hence, n(H₂O) = n(H₂) = 6,00 mol

2) m(H₂O) = n × M = 6,00 mol × (2 + 16) g/mol = 6,00 × 18 mol = 108 g

Mt. Whitney has the second lowest elevation .

Low altitude means any elevation equal to or less than 1219 meters

(4000feet) .

Mt. Whitney is located at the southeastern end of the Sierra Nevada. It is only 85 miles northwest from badwater Basin in death valley,which at 86 meters below at sea level is the lowest point in all North America.

to learn more about Low Elevation click here https://brainly.com/question/6689872?

#SPJ9

Answer:

Explanation:

Primary and secondary succession occur after both human and natural events that cause drastic change in the makeup of an area. Primary succession occurs in areas where there is no soil and secondary succession occurs in areas where there is soil.

In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area previously occupied by living things is disturbed—disrupted—then recolonized following the disturbance.

Hope this helped :)

-Akito

Answer:

HELIUM IS HE ANSWER

Explanation:

GOOD LUCK

Answer:

calcium ca

Explanation:

We can see here that the only element that is on the same group (column) as Ba (Barium) is Calcium (Ca).

False, It consists of an oxygen and hydrogen atom held together by a covalent bond.

The pH of 0.010 M H₂SO₄ is approximately 1.70.

To obtain the pH of 0.010 M H₂SO₄, we first need to consider that H₂SO₄ is a strong acid and dissociates completely in water. The dissociation reaction is as follows:
H₂SO₄ → 2H⁺ + SO₄²⁻
Since H₂SO₄ completely dissociates, the concentration of H⁺ ions will be double the initial concentration of H₂SO₄. Thus, the concentration of H⁺ ions is:
[H⁺] = 2 × 0.010 M = 0.020 M
Now, we can use the pH formula:
pH = -log[H⁺]
Plug in the value of [H⁺]:
pH = -log(0.020)
Calculate the pH:
pH ≈ 1.70
So, the pH of 0.010 M H₂SO₄ is approximately 1.70.

Learn more about pH here, https://brainly.com/question/172153

#SPJ11

Answer:

b

Explanation:

Answer: the first one is work and the second one is energy

Explanation:

Answer:

first :work second:energy

Explanation: