Acids and Bases 2 - A B Yl S J D A [email protected] C D A B C ® SC H~ ~"" T e st#6 7 A c id s a nd Base j K N O WLE D GE AN D U N DER S T AN D I N

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Unformatted text preview: A . B. Yl ' : \ \ S J D. A . V @2 C . D . A . B . C . ® SC H~ ~ " " T e st #6- 7 A c id s a nd Base j ; K N O WLE D GE AN D U N DER S T AN D I N G "- 1 . Which values are correct for a solution of NaOH of concentration . 010 mol ! L at 25 ° C ? H . . L O Q 76 t ( K w = I.O x I0- 14 at 25 ° C) t l q ( )-7 J J tl- I ( ) rl 1 : , ( ) I () I C' ' J I f O . O I }( ) . (; E . ( ) (). ", f), ( 1 1 p O ' " ~ . I 0i f a , Oj;) ylL ,~ -: ( ~ I ~ C 01 1: J ~ /0 ~ ' 2 . A~ 25 ° C water h~ S a pH of? Which of the following occurs when wate r is hea t ed to 3 0° C ? ~ . P /-1 ~ . 1 It remains neutral and its pH decreases. . t: \ J . ~ . ~ r e . .- \ I . , B . It becomes acidic and its pH decreases. ! 1 t M f e ( l f l V ~ It remains neutral and its pH increases . I r . ' It becomes acidic and its pH increases . [WJ= l . O x lO- 2 mol!L [OH- ] = 1 . x lO- 2 mol!L [H l = 1 . x lO- 12 mol ! L [OIr] = 1 . x 10- 12 mol ! L and and and and pH=2 . 00 pH= 12. pOH = 1 2 .0 pOH= 2 . 2. Water dissociates according t o the equation H 2 0(l) ~ W(aq) + OJr(aq) HN0 3 and H 2 S0 4 HN0 3 and H 2 N0 3 + • HN0 3 and HS0 4- H 2 N 3 + and HS0 4- H 2 P0 4- (aq) + ~3(aq) ~ . HPO /- (aq) + NH 4 + (aq) H 2 P0 4- (aq) + OJr(aq ) ~ HPO /- (aq) + H 2 0(l) H 2 P0 4- (aq) + ~HsNH 2 (aq) ~ HPO/- (aq) + C 2 H s NH 3 + (aq ) H 2 P0 4- (aq) + CH 3 COOH(aq) ~ H 3 P0 4 (aq) + CH 3 COQ- (aq) 5. Wh i ch is not a strong acid ? ~ N itric acid B . Sul : fbric acid ® Carbon i c acid D . H y dr o chloric acid 14 , . rr r- 3 1- 1 < . S0 'f Ii C / 6. Which one of the follo wi ng species can act as both a Bmnsted-Lo w r y acid and base in aqu e ous s olution ? 7 . Lim e , Ca(OH) 2 , is added to a lake to neutralize th e ' eff e cts of acid ra in . Th e pH v alu e o f th e lak e wat e r rises from 4 to 7. What is the change in concentration of W ions in the lake wa t e r ? ' . Iij A . An increas e by a factor of 3 . . i ~ J-: . I : > t[ { . / B . An increase b y a factor of 100 L .. /" X A decr e as e b y a fa c...
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This note was uploaded on 11/08/2011 for the course ECON 1B03 taught by Professor Hannahholmes during the Fall '08 term at McMaster University.

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Acids and Bases 2 - A B Yl S J D A [email protected] C D A B C ® SC H~ ~"" T e st#6 7 A c id s a nd Base j K N O WLE D GE AN D U N DER S T AN D I N

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