Q: Which equation correctly expresses the relationship between molarity, moles of solute, and volume of solution?

$M = \frac{\text{moles}}{\text{volume}}$

Q: Which of the following is the correct balanced equation for the reaction between NaOH and HCl?

$\text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2\text{O}$

Q: What is the net ionic equation for the reaction between AgNO$_3$(aq) and NaCl(aq)?

$\text{Ag}^+(aq) + \text{Cl}^-(aq) \rightarrow \text{AgCl}(s)$

Q: Which of the following reactions is a gas evolution reaction?

$\text{Na}_2\text{CO}_3(aq) + 2\text{HCl}(aq) \rightarrow 2\text{NaCl}(aq) + \text{H}_2\text{O}(l) + \text{CO}_2(g)$

Q: Which of the following reactions is a redox reaction?

$4\text{Li}(s) + \text{O}_2(g) \rightarrow 2\text{Li}_2\text{O}(s)$

Q: Which of the following is the correct net ionic equation for the reaction between H$_2$SO$_4$(aq) and Ba(OH)$_2$(aq)?

$2\text{H}^+(aq) + \text{SO}_4^{2-}(aq) + \text{Ba}^{2+}(aq) + 2\text{OH}^-(aq) \rightarrow \text{BaSO}_4(s) + 2\text{H}_2\text{O}(l)$

Question 1

Which equation correctly expresses the relationship between molarity, moles of solute, and volume of solution?

Accepted Answer

$M = \frac{	ext{moles}}{	ext{volume}}$

Question 2

A student dissolves 25.5 g of KBr in enough water to make 1.75 L of solution. What is the molarity of the solution? (Molar mass of KBr = 119.0 g/mol)

Accepted Answer

$0.145\ 	ext{M}$

Question 3

How many moles of NaOH are present in 0.255 mol of NaOH?

Accepted Answer

$0.255\ 	ext{mol}$

Question 4

If you dilute 0.200 L of a 15.0 M NaOH solution to a final volume of 1.00 L, what is the molarity of the diluted solution?

Accepted Answer

$3.00\ 	ext{M}$

Question 5

Which of the following is the correct balanced equation for the reaction between NaOH and HCl?

Accepted Answer

$	ext{NaOH} + 	ext{HCl} ightarrow 	ext{NaCl} + 	ext{H}_2	ext{O}$

Question 6

A solution contains 0.150 M Ca(NO$_3$)$_2$. What is the molarity of NO$_3^-$ ions in the solution?

Accepted Answer

$0.300\ 	ext{M}$

Question 7

Which of the following compounds is a strong electrolyte in water?

Accepted Answer

NaCl

Question 8

What is the net ionic equation for the reaction between AgNO$_3$(aq) and NaCl(aq)?

Accepted Answer

$	ext{Ag}^+(aq) + 	ext{Cl}^-(aq) ightarrow 	ext{AgCl}(s)$

Question 9

Which of the following acids is correctly named?

Accepted Answer

H$_2$SO$_4$ is sulphuric acid

Question 10

A 25.0 mL sample of HClO$_4$ solution requires 22.64 mL of 0.200 M NaOH to reach the equivalence point. What is the concentration of the HClO$_4$ solution?

Accepted Answer

$0.181\ 	ext{M}$

Question 11

Which of the following reactions is a gas evolution reaction?

Accepted Answer

$	ext{Na}_2	ext{CO}_3(aq) + 2	ext{HCl}(aq) ightarrow 2	ext{NaCl}(aq) + 	ext{H}_2	ext{O}(l) + 	ext{CO}_2(g)$

Question 12

What is the oxidation number of chlorine in ClO$_3^-$?

Accepted Answer

$+5$

Question 13

Which of the following statements about oxidation numbers is correct?

Accepted Answer

The oxidation number of an atom in a free element is $0$

Question 14

Which of the following reactions is a redox reaction?

Accepted Answer

$4	ext{Li}(s) + 	ext{O}_2(g) ightarrow 2	ext{Li}_2	ext{O}(s)$

Question 15

Which of the following compounds is insoluble in water?

Accepted Answer

PbSO$_4$

Question 16

What ions are present in an aqueous solution of K$_2$SO$_4$?

Accepted Answer

K$^+$ and SO$_4^{2-}$

Question 17

Which of the following is the correct net ionic equation for the reaction between H$_2$SO$_4$(aq) and Ba(OH)$_2$(aq)?

Accepted Answer

$2	ext{H}^+(aq) + 	ext{SO}_4^{2-}(aq) + 	ext{Ba}^{2+}(aq) + 2	ext{OH}^-(aq) ightarrow 	ext{BaSO}_4(s) + 2	ext{H}_2	ext{O}(l)$

Question 18

A solution is prepared by mixing 0.10 mol of NaCl and 0.10 mol of AgNO$_3$ in water. What mass of AgCl will precipitate? (Molar mass of AgCl = 143.4 g/mol)

Accepted Answer

$14.3\ 	ext{g}$

Solution Concentration, Stoichiometry, and Reactions in Aqueous Solutions

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