Q: Complete and balance the following neutralization equation: $$\text{KOH}(aq) + \text{H}_3\text{PO}_4(aq) \rightarrow$$

$$\text{K}_3\text{PO}_4(aq) + 3\text{H}_2\text{O}(l)$$

Question 1

Which of the following substances contains only covalent bonds and is therefore a molecular substance?

Accepted Answer

CO2

Question 2

Which of the following is a nonelectrolyte when dissolved in water?

Accepted Answer

CH3OH

Question 3

Which compound exhibits hydrogen bonding as its principal intermolecular attraction?

Accepted Answer

CH3OH

Question 4

Which of the following molecules is non-polar?

Accepted Answer

CBr4

Question 5

When Na3PO4 is dissolved in water, which ions are formed?

Accepted Answer

Na+ and $$PO4^{3-}$$

Question 6

The melting point of a fatty acid will increase as the length of its carbon chain _______ and the number of C=C bonds ________.

Accepted Answer

increases; decreases

Question 7

A solution is prepared by dissolving 6.31 g of glycerol (C3H8O3, molar mass = 92.09 g/mol) in enough water to give 275 mL of solution. What is the molarity of this solution?

Accepted Answer

$$0.249\ 	ext{M}$$

Question 8

A 4% starch solution and a 10% starch solution are separated by a semi-permeable cell membrane. What will occur?

Accepted Answer

There is a net flow of water from the 4% solution to the 10% solution

Question 9

Which one of the following solutions would have the highest osmotic pressure?

Accepted Answer

0.20 M MgCl2

Question 10

What is the total concentration of dissolved particles in a 0.142 M solution of Na2SO4?

Accepted Answer

$$0.426\ 	ext{M}$$

Question 11

Which of the following is an example of a triprotic acid?

Accepted Answer

H3PO4

Question 12

A 5.0 	imes $$10^{-3} M $$aqueous solution of HCl has a pH of ______.

Accepted Answer

$$2.30$$

Question 13

A technician wishes to prepare 225 mL of a 1.5 M solution of NaOH from a 12 M stock solution. What volume of the stock solution should be used?

Accepted Answer

$$18\ 	ext{mL}$$

Question 14

Which of the following species can readily act as either an acid or a base, according to the Bronsted-Lowry definition?

Accepted Answer

HSO4–

Question 15

Solution A contains 0.1 M NaCl and solution B contains 0.1 M glucose (C6H12O6). Which statement about these two solutions is correct?

Accepted Answer

Solution A is hypertonic with respect to Solution B

Question 16

The pH of a solution changes from 7 to 5. Which of the following correctly describes the change in $$[H_3O^+]$$?

Accepted Answer

Increases by 100

Question 17

Which of the following is the conjugate base of HSO4–?

Accepted Answer

$$SO4^{2-}$$

Question 18

A red blood cell is placed in a 0.50% m/v NaCl solution. What will happen to the cell?

Accepted Answer

The cell will swell and possibly burst due to water entering

Question 19

A technician dissolves 0.625 g of glucose (C6H12O6; molar mass = 180.2 g/mol) in sufficient water to give 355 mL of solution. What is the molarity of the solution?

Accepted Answer

$$0.0099\ 	ext{M}$$

Question 20

Complete and balance the following neutralization equation: $$	ext{KOH}(aq) + 	ext{H}_3	ext{PO}_4(aq) ightarrow$$

Accepted Answer

$$	ext{K}_3	ext{PO}_4(aq) + 3	ext{H}_2	ext{O}(l)$$

GOB Chemistry Study Guide: Molecules for Life Quiz 4 Sample Questions

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