Chem271_S11_x1

Chem271_S11_x1 - Chemistry 271, Section 21xx Prof. Jason...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 271, Section 21xx Your Name: Prof. Jason Kahn University of Maryland, College Park Your SID #: General Chemistry and Energetics Your Section #: Exam I (100 points total) March 7, 2011 You have 50 minutes for this exam. Exams written in pencil or erasable ink will not be re-graded under any circumstances. Explanations should be concise and clear . I have given you more space than you should need. There is extra space on the last page if you need it. You will need a calculator for this exam. No other study aids or materials are permitted. Partial credit will be given, i.e. , if you don’t know, guess. Useful Equations: K a = [H + ][A ]/[HA] pH = –log([H + ]) K b = [BH + ][HO ]/[B] F = ma ¸ e i π + 1 = 0 PV = nRT K w = [H + ][HO ] = 10 –14 pH = pK a + log([A ]/[HA]) pH (e.p.) = (p K a1 + p K a2 )/2 R = 0.08206 L·atm/mole K 0 °C = 273.15 K p K a = –log( K a ) K p = K c (RT) n P 2 /a 3 = 4 π 2 /MG × E = – B / t Honor Pledge: At the end of the examination time, please write out the following sentence and sign it, or talk to me about it: “I pledge on my honor that I have not given or received any unauthorized assistance on this examination.” +1 point extra credit for filling in this box
Background image of page 1

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

View Full DocumentRight Arrow Icon
Chemistry 271, section 21xx Exam I, 3/7/11 2/8 Score for the page 1. (20 pts) Fill in the Blanks Read the whole sentence before you fill in the blanks. (a; 2 pts) K c and K p are equal if the does not change during the reaction. (b; 2 pts) The value of the reaction quotient Q approaches as the reaction progresses. (c; 4 pts) At equilibrium, the rates of forward and reverse reactions are and are as each other. (d; 4 pts) The of a weak acid is a strong base whose pK b can be predicted from the pK a of the weak acid using the equation . (e; 2 pts)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 8

Chem271_S11_x1 - Chemistry 271, Section 21xx Prof. Jason...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online