What is the molar mass of magnesium chlorite (Mg(CIO2)2)?

Problem PageQuestion A chemist makes of magnesium fluoride working solution by adding distilled water to of a stock solution of

igomit [66]

Answer:

5.37 × 10⁻⁴ mol/L

Explanation:

A chemist makes 660. mL of magnesium fluoride working solution by adding distilled water to 230. mL of a 0.00154 mol/L stock solution of magnesium fluoride in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits.

Step 1: Given data

Initial concentration (C₁): 0.00154 mol/L

Initial volume (V₁): 230. mL

Final concentration (C₂): ?

Final volume (V₂): 660. mL

Step 2: Calculate the concentration of the final solution

We want to prepare a dilute solution from a concentrated one. We can calculate the concentration of the final solution using the dilution rule.

C₁ × V₁ = C₂ × V₂

C₂ = C₁ × V₁ / V₂

C₂ = 0.00154 mol/L × 230. mL / 660. mL = 5.37 × 10⁻⁴ mol/L

5 0

2 years ago

Which of these describes an endothermic reaction?

neonofarm [45]

B) energy is absorbed by the reaction
is right answer.

3 0

3 years ago

A solution is a homogenous mixture of solute and solvent. There are different types of solutions. A carbonated drink is an examp

goblinko [34]

Answer:

A.) Gases are readily soluble in water at higher temperatures: FALSE

B.) Carbon dioxide gas will be less soluble in water when the partial pressure is low: TRUE

C.) Zinc sulfate is soluble in water: TRUE

D.) Propanol and heptane are miscible: FALSE

E.) Table salt dissolves in water to form a solution: TRUE

Explanation:

The answer choices are:

A.) Gases are readily soluble in water at higher temperatures.
B.) Carbon dioxide gas will be less soluble in water when the partial pressure is low.
C.) Zinc sulfate is soluble in water.
D.) Propanol and heptane are miscible.
E.) Table salt dissolves in water to form a solution.

<h2>Solution</h2>

Let's see every statement

A.) Gases are readily soluble in water at higher temperatures.

This is false. At higher temperature, the gas molecules will have higher kinetic energy, meaning that they will move faster and escape more easily from the liquid phase. Thus, gases are less soluble at higher temperatures.

B.) Carbon dioxide gas will be less soluble in water when the partial pressure is low.

This is TRUE.

HIgher pressures "push" the gas molecules into the liquid phase. When more molecules get dissolved the pressure is partially relieved.

This relation is stated by Henry's Law: the solubility of gases in liquids is directly proportional to the pressure of the gases above the surface of the solution. Thus, carbon dioxide will me less soluble in water when the pressure is low.

C.) Zinc sulfate is soluble in water.

This is TRUE.

You must resort to the rules of solubility or search the properties of this salt.

Th solubility rules state that most sulfates are soluble in water. Exceptions are sulfates of Ag⁺,Ca²⁺, Sr²⁺, Ba²⁺, Hg²⁺, and Pb²⁺. Thus, you can expect that zinc sulfate is soluble in water.

D.) Propanol and heptane are miscible.

This is false.

Propanol is a polar compound. It is miscible with water because water is polar too. Heptane is not polar. Thus, following the rule that "like dissolves like" propanol and heptane are not miscible.

E.) Table salt dissolves in water to form a solution.

This is TRUE.

This is a classical example of an ionic compound (sodium chloride) that is soluble in water (a polar solvent), showing the rule that polar solvents dissolve polar and ionic compounds.

It is also an everyday fact: rice, for instance, absorbs salt from water because the salt is dissolved in the water.

3 0

3 years ago

How is a crystal different from a solid made of individual molecules

Dmitry [639]

In a crystal, the molecules are closer together as they are in any solid. they have less room to move, and might even be combined together rather than individual

3 0

2 years ago

We say that salts will dissociate but acids will react with water. We say that acids will

Paha777 [63]

Answer:

ionize

Explanation:

Acids are chemical substances that lose/donate their hydrogen ion (H+) when they react with water. This property of acids is termed IONIZATION. In a chemical reaction involving acids and bases, acids release their proton or hydrogen ion (H+) in the presence of water solutions to form a conjugate base, which is usually an anion.

For example, in the chemical reaction;

HX + H20 -------> X- + H30+

HX is the acid because it loses its electron to water and forms the anion, X-, which is the conjugate base. Hence, it can be said that acid HX ionizes in water.

7 0

2 years ago