Chemistry chapter 9 (quiz)

The [H3O+] and the pH of a 0.021 M HNO3 solution?

0.021 M and 1.68

What is the [H3O+] concentration of a solution that has a pH = 2.34?

4.6 x 10^-3M

In the following equation which is the proton donor and which is the proton acceptor?CO3-2 (aq) + H2O (l) → HCO3- (aq) + OH- (aq) A. Donor: CO3-2; acceptor: H2O B. Donor: H2O; acceptor: CO3-2 C. Donor: OH-; acceptor: HCO3- D. Donor: HCO3-; acceptor: OH-

B. Donor: H2O; acceptor: CO3-2

Which one of the following is the strongest weak acid? A. HCN (Ka = 6.2 × 10-10) B. HF (Ka = 6.5 × 10-4) C. HClO (Ka = 3.0 × 10-8) D. HNO2 (Ka = 4.5 × 10-4)

B. HF (Ka = 6.5 × 10-4)

What is the conjugate base of OH-? A. H2O B. O-2 C. O2 D. O-

B. O-2

An Arrhenius acid is defined as a substance which: A. acts as proton acceptor in any system B. increases [H+] when placed in water C. decreases [H+] when placed in water D. acts as proton donor in any system

B. increases [H+] when placed in water

Consider the following system at equilibrium:N2 (g) + 3 H2 (g) ↔ 2 NH3 (g) + 92.94 kJWhich of the following changes will shift the equilibrium to the right? 1. Increasing the temperature 2. Decreasing the temperature3. Removing some NH3 4. Adding some NH35. Removing some N2 6. Adding some N2 A. 1, 3, 6 B. 1, 4, 5 C. 2, 3, 6 D. 2, 4, 6

C. 2, 3, 6

Which of the following is not a strong base? A. NaOH B. KOH C. Al(OH)3 D. Ca(OH)2

C. Al(OH)3

Which of the following compounds will form CO2 and H2O when it reacts with an acid? A. Mg(OH)2 B. NaC2H3O2 C. CaCO3 D. NH3

C. CaCO3

When a person does excess vomiting the condition the blood develops is called: A. metabolic acidosis B. respiratory acidosis C. metabolic alkalosis D. respiratory alkalosis

C. metabolic alkalosis

If the pI for a particular amino acid is 7.5, at which pH will the net charge on the molecule be 1-? A. 2.5 B. 7.5 C. 5.0 D. 10.0

D. 10.0

Which of the following is a correct balanced equation for the neutralization reaction that occurs between Al(OH)3 and HCl (aq)? A. Al(OH)3 + 3 HCl (aq) → AlCl3 + H+ + OH- B. Al+3 + OH- + H+ + Cl- → AlCl3 + H2O C. Al(OH)3 + HCl (aq) → AlCl3 + H2O D. Al(OH)3 + 3 HCl (aq) → AlCl3 + 3 H2O

D. Al(OH)3 + 3 HCl (aq) → AlCl3 + 3 H2O

Given the following reaction,write the equilibrium expression: C (s) + 2 H2 (g) ↔ CH4 (g) A. [CH4]/[C] [H2]2 B. [C][H2] C. [H2]2[C]/[CH4] D. [CH4]/[H2]2

D. [CH4]/[H2]2

When a system is at equilibrium: A. the reaction rate of the reverse reaction is small compared to forward. B. the amount of product and reactant is exactly equal. C. the reaction rate of the forward reaction is small compared to the reverse. D. the reaction rate of the forward reaction is equal to the rate of the reverse.

D. the reaction rate of the forward reaction is equal to the rate of the reverse