Chemistry Quiz
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Name______Period______Chemistry Quiz
II. Matching ______1) Red in litmus ______7) pink in phenolphthalein ______2) [OH-] > [H+] ______8) vinegar a) acid ______3) pOH = 6.3 ______9) tastes sour ______4) NaNO3(aq) ______10) [OH-] = [H+] b) base -9 ______5) KC2H3O2 (aq) ______11) [H+] = 3.4 X 10 ______6) pH = 5.2 ______12) NH4Cl(aq) c) neutral
III. For each of the following reactions label the acid (a), the base (b), the conjugate acid (ca), and the conjugate base (cb).
- - 1) H2CO3 + OH HCO3 + H2O ______
+ - 2) CH3NH2 + H2O CH3NH3 + OH ______
+ - 3) HBr + H2O H3O + Br ______
IV. Problems. You must show your work for credit. 1) Given [OH-] = 1.5 x 10 –5, find [H+] , pH , pOH and tell if it is acidic or basic.
[H +] = pH = pOH = acidic or basic
2) Given pH = 5.7, find [OH-] , pOH , [H+] and tell if it is acidic or basic
[OH -] = pOH = [H+] = acidic or basic 3) Find the pH of a 0. 0045 M solution of NaOH.
3)
4) The pH of a 0.063 M solution of hypobromous acid (HBrO) is 4.95. Calculate Ka.
4)
5) How many mL of a 0.34 M of HCl are needed to neutralize 125 mL of a 0.11 M Ba(OH)2 ?
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6) What is the molar concentration of15 ml H3PO4 if it takes 25 mL of 0.85 M NaOH to neutralize the acid ?
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7 How many equilivants are in 6.34 L of a 0.75N solution of H3PO4
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8a) ______Mg(OH)2 + ______HBr 8b) ______Al(OH)3 + ______H2CO3
9 If 25.00 mL of citric acid solution is titrated with 28.12 mL of 0.1718 N KOH, what is the concentration of citric acid? (hint: normality is a concentration unit!)
10)