MIDTERM 3 KEY

MIDTERM 3 KEY - a) CaO + H 2 O Ca(OH) 2 b) CH 4 + 2 O 2 CO...

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Midterm Exam 3, CHEM 001 Fall, 2006. (Chapters 12, 13, 14, 15 and 16) Name: ______________________ Date: ____________ Please note that the chemical equations below may not be balanced. 1) What is the density of O 2 at 25.0°C and 0.250 atm? a) 0.348 g/L b) 0.696 g/L c) 0.985 g/L d) 0.327 g/L 2) How many liters of H 2 (at STP) can be produced from 12.5 g of Na reacting with an excess of concentrated hydrochloric acid? Na(s) + HCl(aq) NaCl(aq) + H 2 (g) a) 4.41 L b) 6.09 L c) 17.6 L d) 44.8 L 3) What is the total volume of a 0.212 M KOH solution prepared from 40.0 mL of 2.50 M KOH? a) 3.39 mL b) 472 mL c) 21.2 mL d) 432 mL 4) The effect of hydrogen bonding is greatest when hydrogen is a) covalently bonded to an element of high electronegativity b) covalently bonded to an element of low electronegativity c) in the form of its positive ion, H+ d) in the form of its negative ion, H-
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Midterm Exam 3, CHEM 001 Fall, 2006. (Chapters 12, 13, 14, 15 and 16) 5) Which of the following is a neutralization reaction?
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Unformatted text preview: a) CaO + H 2 O Ca(OH) 2 b) CH 4 + 2 O 2 CO 2 + 2 H 2 O c) 2 KOH + H 2 SO 4 K 2 SO 4 + 2 H 2 O d) H 2 SO 4 + BaCl 2 BaSO 4 + 2HCl 6) The net ionic equation for the reaction NaCl (aq) + AgNO 3 (aq) NaNO 3 (aq) + AgCl (s) is a) AgNO 3 Ag + + NO 3 b) NaCl Na + + Cl-c) AgNO 3 + NaCl Ag + + NO 3 + Na + + Cl-d) Ag + + Cl- AgCl 7) What is the pH of a 0.0015 M HCl solution? a) 7.00 b) 2.82 c) 2.00 d) 1.92 8) What is the pH of a 0.0015 M NaOH solution? a) 11.18 b) 2.82 c) 10.25 d) 12.08 9) A 0.400 M solution of a weak acid, HA, has a pH of 2.36. The ionization constant, K a , for the acid is a) 2.4 x 10 2 b) 7.2 x 10 3 c) 2.4 x 10 4 d) 4.82 x 10 5 10) A 0.400 M solution of acetic acid, H 3 C 2 O 2 H, has a K a of 1.8 x 10-5 . What is the pH of this solution? a) 2.72 b) 2.57 c) 3.72 d) 4.89...
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This note was uploaded on 02/27/2010 for the course CHEM 1132 taught by Professor Cole/clark during the Spring '08 term at UCM.

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MIDTERM 3 KEY - a) CaO + H 2 O Ca(OH) 2 b) CH 4 + 2 O 2 CO...

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