Q: Which of the following is a correct net ionic equation for the reaction between aqueous solutions of $$ ext{AgNO}_3$$ and $$ ext{NaCl}$$?

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

Q: Which of the following pairs are conjugate acid–base pairs?

$$\text{NH}_4^+$$ / $$\text{NH}_3$$

Q: Which of the following is the correct balanced equation (including phases) for the reaction of aqueous potassium sulfate with aqueous barium nitrate?

$$\text{K}_2\text{SO}_4 (aq) + \text{Ba(NO}_3)_2 (aq) \rightarrow 2\text{KNO}_3 (aq) + \text{BaSO}_4 (s)$$

Q: Which of the following is a correct molecular equation for the neutralization of $$ ext{HBr}$$ with $$ ext{Ba(OH)}_2$$?

$$2\text{HBr} (aq) + \text{Ba(OH)}_2 (aq) \rightarrow 2\text{H}_2\text{O} (l) + \text{BaBr}_2 (aq)$$

Question 1

Which of the following correctly identifies the limiting reagent when 10.0 g of $$	ext{CaCl}_2$$ reacts with 12.0 g of $$	ext{Na}_2	ext{CO}_3$$ according to the equation:

$$
	ext{CaCl}_2 (aq) + 	ext{Na}_2	ext{CO}_3 (aq) ightarrow 	ext{CaCO}_3 (s) + 2	ext{NaCl} (aq)

($$Molar masses: $$	ext{CaCl}_2 = 110.98 g/$$mol, $$	ext{Na}_2	ext{CO}_3 = 105.99 g/$$mol)

Accepted Answer

CaCl$$_2 is $$the limiting reagent

Question 2

A student needs to prepare 250.0 mL of a 0.200 M $$	ext{NaOH}$$ solution from a 2.00 M stock solution. What volume of the stock solution should be used?

$$
M_1V_1 = M_2V_2
$$

Accepted Answer

$$25.0 mL$$

Question 3

Which of the following is a correct net ionic equation for the reaction between aqueous solutions of $$	ext{AgNO}_3$$ and $$	ext{NaCl}$$?

Accepted Answer

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

Question 4

Which of the following compounds is a strong electrolyte in aqueous solution?

Accepted Answer

$$	ext{Na}_2	ext{SO}_4$$

Question 5

What is the percent yield if 8.50 g of $$	ext{CO}_2 is $$produced from a reaction with a theoretical yield of 10.0 g?

Accepted Answer

$$85.0\%$$

Question 6

Which of the following is NOT a strong acid?

Accepted Answer

$$	ext{HF}$$

Question 7

A solution has $$[	ext{H}^+] = 1.0 	imes 10$$^{-5}$$ M. What is its pH?

Accepted Answer

$$5.0$$

Question 8

Which of the following pairs are conjugate acid–base pairs?

Accepted Answer

$$	ext{NH}_4^+$$ / $$	ext{NH}_3$$

Question 9

Which of the following best describes the solution formed when 0.10 M $$	ext{HCl} is $$mixed with 0.10 M $$	ext{NaOH} in $$equal volumes?

Accepted Answer

The solution is neutral

Question 10

Which of the following is the correct balanced equation (including phases) for the reaction of aqueous potassium sulfate with aqueous barium nitrate?

Accepted Answer

$$	ext{K}_2	ext{SO}_4 (aq) + 	ext{Ba(NO}_3)_2 (aq) ightarrow 2	ext{KNO}_3 (aq) + 	ext{BaSO}_4 (s)$$

Question 11

How many molecules are present in 0.250 mol of $$	ext{C}_6	ext{H}_{12}	ext{O}_6 ($$glucose)?

(Avogadro's number $$= 6.022 	imes 10$$^{23}$$ molecules/mol)

Accepted Answer

$$1.51 	imes 10$$^{24}$$

Question 12

Which of the following is a weak base?

Accepted Answer

$$	ext{NH}_3$$

Question 13

A 50.0 mL sample of 0.100 M $$	ext{H}_2	ext{SO}_4 is $$titrated with 0.200 M $$	ext{NaOH}. $$What volume of $$	ext{NaOH} is $$required to reach the equivalence point?

$$
	ext{H}_2	ext{SO}_4 + 2	ext{NaOH} ightarrow 2	ext{H}_2	ext{O} + 	ext{Na}_2	ext{SO}_4
$$

Accepted Answer

$$25.0 mL$$

Question 14

Which of the following is a spectator ion in the reaction between aqueous solutions of $$	ext{KBr}$$ and $$	ext{AgNO}_3$$?

Accepted Answer

$$	ext{K}^+$$

Question 15

Which of the following best describes the classification of $$	ext{HNO}_2 in $$aqueous solution?

Accepted Answer

Weak acid

Question 16

A solution is prepared by dissolving 5.00 g of $$	ext{NaCl} in $$enough water to make 100.0 g of solution. What is the percent by mass of $$	ext{NaCl} in $$the solution?

Accepted Answer

$$5.00\%$$

Question 17

Which of the following is the correct name for $$	ext{Fe}_2(	ext{SO}_4)_3$$?

Accepted Answer

Iron(III) sulfate

Question 18

Which of the following best describes the role of dimensional analysis in stoichiometric calculations?

Accepted Answer

It allows conversion between units using conversion factors

Question 19

Which of the following is a correct molecular equation for the neutralization of $$	ext{HBr}$$ with $$	ext{Ba(OH)}_2$$?

Accepted Answer

$$2	ext{HBr} (aq) + 	ext{Ba(OH)}_2 (aq) ightarrow 2	ext{H}_2	ext{O} (l) + 	ext{BaBr}_2 (aq)$$

Question 20

Which of the following statements about solubility rules is correct?

Accepted Answer

All nitrates are soluble in water

CHEM 141 – Exam 2 Study Guide: Chemical Reactions, Stoichiometry, and Aqueous Chemistry

Guida di studio - Domande di pratica

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