$$M = \frac{\text{amount of solute (in mol)}}{\text{volume of solution (in L)}}$$

Question 1

Which statement best describes a precipitation reaction as used in molecular gastronomy?

Accepted Answer

It is a reaction where two solutions are mixed and a solid forms.

Question 2

In a solution of salt and water, which component is the solute?

Accepted Answer

Salt

Question 3

Which of the following best describes a concentrated solution?

Accepted Answer

A solution with a large amount of solute compared to solvent.

Question 4

Which equation correctly expresses molarity ($$M) of a $$solution?

Accepted Answer

$$M = \frac{	ext{amount of solute (in mol)}}{	ext{volume of solution (in L)}}$$

Question 5

If you dissolve 25 g of salt in 251 g of water, what is the mass of the resulting solution?

Accepted Answer

276 g

Question 6

A student prepares 1.00 L of a 1.00 M NaCl solution. How many moles of NaCl are present in the solution?

Accepted Answer

1.00 mol

Question 7

Which of the following is true about the composition of solutions?

Accepted Answer

The composition of solutions can vary from one sample to another.

Question 8

Which of the following is an aqueous solution?

Accepted Answer

A solution in which water is the solvent.

Question 9

A chemist wants to prepare 3.0 L of a 0.500 M CaCl$$_2$$ solution from a stock solution. How many moles of CaCl$$_2$$ are required?

Accepted Answer

1.5 mol

Question 10

Which of the following best describes the difference between a solute and a solvent in a solution?

Accepted Answer

The solvent is the majority component and the solute is the minority component.

Question 11

A solution contains 0.500 mol NaCl in 1.00 L of solution. What is the molarity of NaCl?

Accepted Answer

$$0.500\ M$$

Question 12

Which of the following is a correct real-world application of precipitation reactions?

Accepted Answer

Chefs use precipitation reactions to encapsulate liquids in molecular gastronomy.

Question 13

Which statement about molarity is correct?

Accepted Answer

Molarity is the number of moles of solute per liter of solution.

Question 14

Which of the following would result in a more dilute solution?

Accepted Answer

Adding more solvent to the solution.

Question 15

A solution is described as 2.0 M. What does this mean?

Accepted Answer

There are 2.0 moles of solute in 1.0 L of solution.

Introduction to Solutions and Aqueous Reactions (General Chemistry Chapter 5 Study Notes)

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