{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Practice EX 1 - CHM 2046 EXAM 1 l Please Bubble in D as the...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: CHM 2046 EXAM 1 l. Please Bubble in D as the Test Form Code at the Top Right of Your Answer Sheet. If volume is increased, which of these properties will increase? 2 NaHC03(S) :2 Na2C03(S) + C02(g) + H20(g) (a) “Na2C03 (b) “co2 (c) P002 (1) a only (2) b only (3) c only (4) a and b (5) b and c What is the pH of 1.0 x 10'10 M HCl? (1) 6.00 (2) 5.00 (3) 4.00 (4) 7.00 (5) 10.00 Which of these changes will cause NO to increase? 2 NOBl‘(g) \——‘ 2 NO(g) + Br2(g), AH = 16.3 kJ/mol (a) add Br; (b) increase V (c) raise T (1) c only (2) b only (3) a only (4) a and b (5) b and c Which solution (all 0.1 M) will have the highest (most basic) pl}? (1) NaHCO; (2) NH4N03 (3) N a2C03 (4) KN03 (5) NaNOz Which of the above will have the lowest (most acidic or least basic) LH? A Ca(OH)2 solution has a pH of 12.0. What is the value of Ca+2 ? (1) 4.0 M (2) 0.005 M (3) 1 x 10'”M (4) 0.01 M (5) 0.02 M If P02 = 0.20 atm (at equilibrium), what will be the rim—o, (P$03 / PS 02 )? 2 502(g) + 02(g) x——‘ 2 SO3(g), KP = 11-4 (1) 0.65 (2) 5.2 (3) 7.5 (4) 1.5 (5) 2.3 Using data from the acid-base table, find the value of K for this equation. H2P04' + OH“ —» HP04'2 + H20, K = (1) 1.3 x 10'12 (2) 6.2 x 10‘8 (3) 6.2 x 10+6 (4) 1.6 x 10'7 What is the conjugate acid of the oxalate ion, C204'2? (1) C204 (2) HC204'2 (3) C20;2 (4) HCOz' (5) 1.6x 10+7 (5) HC204' 10. If Kw = 1.0 x 10'14 at 25°C and Kw = 5.5 x 10'“ at 50°C, what is AHm. for 2 H20 : 110* + OH'? (1) 3.7 kJ/mol (2) 55. kJ/mol (3) 540 kJ/mol (4) 24. kJ/mol (5) 710 kJ/mol _________—____—_———-—————— The next 2 items refer to this equilibrium. Initially all P’s are 1.00 atm. 11. 12. 2ICl(g) v—x— 12(g) + c126). Kp=0.11 What is PI at equilibrium? 2 (1) 0.20 atm (2) 0.67 atm (3) 0.60 atm (4) 0.50 atm (5) 0.27 atm What is PICI at equilibrium? (1) 1.8 atm (2) 1.6 atm (3) 1.4 atm (4) 2.0 atm (5) 2.5 atm W The next 2 items refer to a 0.100 M (as prepared) solution of weak acid HX. The observed pH is 1.50. 13. 14 What is the degree of ionization (0.) for HX in this solution? (1) 3.2% (2) 68% ((3) 32% (4) 47% (5) 5.0% What is the value of Ka for HX? (1) 1.5 x 10'2 (2) 1.0 x 10'2 (3) 3.2 x 10'2 (4) 0.47 (5) 6.0 x 10'7 ——_____—__—__—————-—_————— The next 2 items refer to a 0.025 M N21280:; solution. 15. 16. What is the value of Kb for SO34? (1) 2.1 x10'4 (2) 1.632107 (3) 8.3x10‘13 (4) 6.2x10'8 (5) 6.2x10‘6 Which is closest to the pH of the solution? (1) 4.2 (2) 9.8 (3) 8.4 7 (4) 7.2 (5) 10.3 M The next 3 items refer to a 0.010 M (as prepared) H3PO4 solution. First calculate [H3O+] for this solution. 17. 18. 19. 20. What is the pfl of this solution? (1) 1.52 ((2): 2.25 (3) 1.88 (4) 2.06 (5) 4.12 What is the degree of ionization (a) for this solution? (1) 70.% (2) 57% (3) 30.% (4) 9.3% (5) 87% Which is closest to the [H3PO4] at equilibrium? (1) 0.001 M (2) 0.004 M (3) 0.006 M (4) 0.002 M (5) 0.008 M What is the net ionic equation for the reaction HCl(aq) with NazHPO4(aq)? Write your answer in the bottom margin of your bubble answer sheet. Q") ...
View Full Document

{[ snackBarMessage ]}