Question 1

Which of the following best describes a chemical reaction?

Accepted Answer

A process where substances change into new substances with different properties.

Question 2

When balancing the chemical equation $$\ce{2H_2 + O_2$ -\u003e 2H_2O}$$, what does the coefficient '2' in front of $$\ce{H_2$}$$ indicate?

Accepted Answer

There are two molecules of hydrogen gas reacting.

Question 3

Which type of chemical reaction is represented by the equation $$\ce{$$AgNO_3$$ (aq) + NaCl (aq) -\u003e AgCl (s) + $$NaNO_3$$ (aq)}$$?

Accepted Answer

Precipitation reaction

Question 4

In an acid-base reaction, which of the following is always formed?

Accepted Answer

Water and a salt

Question 5

A student mixes 50.0 g of $$\ce{NaCl}$$ with excess water. If the limiting reactant is $$\ce{NaCl}$$, what does this mean?

Accepted Answer

All of the $$\ce{NaCl}$$ will be used up first, determining the maximum amount of product formed.

Question 6

Which intermolecular force is present in all molecules, including nonpolar ones?

Accepted Answer

London dispersion forces

Question 7

Which of the following molecules can form hydrogen bonds?

Accepted Answer

NH$$_3$$

Question 8

A liquid with strong intermolecular forces will have which of the following properties?

Accepted Answer

High boiling point and high viscosity

Question 9

Which statement about solids is correct?

Accepted Answer

Solids can be crystalline (ordered) or amorphous (random).

Question 10

During which phase change is energy absorbed by the substance?

Accepted Answer

Melting

Question 11

Which of the following best describes a solution?

Accepted Answer

A homogeneous mixture of solute dissolved in solvent

Question 12

What is the molarity ($$M) of a $$solution made by dissolving 0.50 mol of $$\ce{NaCl} in 1.0 L of $$water?

Accepted Answer

$$0.50\ M$$

Question 13

Which factor does NOT affect the solubility of a solute in a solvent?

Accepted Answer

Color of the solute

Question 14

Which property depends only on the number of particles in solution, not their identity?

Accepted Answer

Colligative properties

Question 15

Which of the following is an example of a colligative property?

Accepted Answer

Boiling point elevation

Question 16

A solution is prepared by dissolving 1.0 mol of $$\ce{NaCl} in $$water. How many moles of particles are present in the solution?

Accepted Answer

2.0 moles (1 mol $$\ce{Na^+} + 1 $$mol $$\ce{Cl^-})$$

Question 17

Which of the following substances will conduct electricity when dissolved in water?

Accepted Answer

NaCl

Question 18

A student wants to increase the boiling point of water. Which of the following will achieve this?

Accepted Answer

Adding salt to the water

Question 19

Which intermolecular force is responsible for the high boiling point of water?

Accepted Answer

Hydrogen bonding

Question 20

A solution contains 0.1 mol of $$\ce{K_2SO_4}$$ dissolved in water. How many moles of ions are present in the solution?

Accepted Answer

0.3 moles (0.2 mol $$\ce{K^+} + 0.1 $$mol $$\ce{SO_4$^{2-}})$$

General Chemistry Study Notes: Chemical Reactions, Intermolecular Forces, and Properties of Solutions

스터디 가이드 - 연습 문제