3. An amphoteric substance is one that A. may react as an acid or a conjugate ac

Question

3. An amphoteric substance is one that A. may react as an acid or a conjugate acid C. may react as a base or a conjugate base B. may react as a salt D. may react as an acid or a base 4. Combining sodium hydroxide and hydrochloric acid will produce water and 5. Which pH is most alkaline? 6. How many times more concentrated is the hydrogen ion concentration i A. sodium chloride. B. sodium chlorite. C. sodium chlorate. D. sodium hypochlorite. n a solution with a pH of 3 than that with a pH of 5? A. 2 times B. 10 times C. 100 times D. 1000 times 7. The pH of a solution can be calculated from the expression 8. What is the net ionic equation when hydrobromic acid reacts with potassium hydroxide? 9. Which is the Base/ Conjugate Acid pair in the following equation'? A. pl- log [OI'] B. p-log [OH'] C. pH-log H' D. pH log [H] C. K+1+OH KOH C. H2O and H30+1 D. H3PO4 and H30" · A. HP04 and H2O B. I 13°+1 and H2PO4.1 What is the conjugate base of NH3? A. NH2-1 10. B. NH2 C. NH4+ D. H1

Explanation / Answer

3. amphoteric substance react with acid or base
D. may react as an acid or base>>>>answer
4. NaOH(aq) + HCl(aq) -------> NaCl(aq) + H2O(l)
A. sodium chloride>>>>answer
5. PH>7 alkaline solution
D. 12 >>>>answer
6.C.100 times>>>>answer
7. PH = -log[H^+]
C. PH = -log[H^+] >>>>>>answer
8. KOH(aq)+ HBr(aq) -------> KBr(aq) + H2O(l)
    K^+ (aq) + OH(aq)+ H^+ (aq) +Br^-(aq) -------> K^+(aq) + Br^-(aq) + H2O(l)
    H^+ (aq) + OH^-(aq) ------> H2O(l)   Net ionic equation
A. H^+ (aq) + OH^-(aq) ------> H2O(l)>>>>>answer
9. H3Po4 + H2O ---------> H3O^+     +      H2PO4^-
   acid     base           conjugate acid    conjugate base
C. H2O and H3O^+ >>>answer
10. NH3 -----> NH2^-
A. NH2^-
  

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