Which of these is amphiprotic(amphoteric)? H_2O HCO_3 SO_2 a and b identify the

Question

Which of these is amphiprotic(amphoteric)? H_2O HCO_3 SO_2 a and b identify the conjugate base for HA in the following equation HA + H_2O rightarrow A + H_2O H_2O H_20 A HA Solution A has a ph of 5 and solution b has a ph of 8.which has the greater concentration of OH solution B solution A solutions A and B have the same OH concentrations impossible to tell distilled water has ph of 7.00 (neutral Ph)distilled water has no ions no H_3O inos no OH inos [H_0O]-[OH] which of the following bases would have the highest ph value? 0.1 mol/L NaOH 0.1 mol/L Ba(OH)_2 55.5 mol/L H_2O 0.01 mol/L LIOH A1.50 mol/L acid (HA) has a percent ionization of 3.3% what is the ph of the solution? 1.5 0.176 1.305 3.3 if k_a = 5.8 times 10^-10 then what is the value of K_b? 8.2 times 10^-4 6.3 times 10^5 9.2 1.7 times 10^-5

Explanation / Answer

9. a and b both...Amphoteric compounds can act both an acid and a base.

10.c A- ..conjugate base.

11. a. solution B..

12. d...equal concentration

13.a...as NaOH is most polar and completely dissociates in water to give 0.1M OH-. Ba(OH)2 cannot completely ionize in water.

14.c...(if, x/1.5=.033, x=.0495, -logx= 1.30)

15.d...(as KaXKb =Kw=10-14)

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