Which of the following is the least acidic? dihydrogen phosphate ion (pKa = 7.21

Question

Which of the following is the least acidic? dihydrogen phosphate ion (pKa = 7.21) water (pKa = 15.74) actetic acid (pKa = 4.76) hydrochloric acid (pKa = -7.0) A) dihydrogen phosphate ion B) water C) acetic acid D) hydrochloric acid

Which of the following is the least acidic? glucose (pKa = 12.3) ammonia (pKa = 9.26) pyrimidine (pKa = 1.3) pyrrole (pKa = 0.40) A) glucose B) ammonia C) pyrimidine D) pyrrole

Identify the base in the following chemical equation: CH3CO2H + OH- ? H2O + CH3CO2- A) CH3CO2H B) OH- C) H2O D) CH3CO2-

Consider the reaction below: HNO2 (aq) + H2O (l) ? H3O+ (aq) + NO2- (aq) What is the proton acceptor? A) H3O+ B) NO2- C) H2O D) HNO2

Which of the following is the correct tetrahedral representation of CBr4? A B C What is the bond angle for carbon 4 in the molecule below? 120 degree 109.5 degree 180 degree 90 degree

Explanation / Answer

1. B) water

2. A) glucose

3. B) OH-

4. C) H2O

figure based questions

3. C

6. C) 180

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