Answer Happy

1. It takes 31.4 s for a 0.150 M solution to completely
react when exposed to
another reactant. What is the average rate of reaction in units of
M/s?
2. Below is the chemical equation for the reaction
investigated by this
experiment. Which would indicate a faster reaction rate:
i. [H+] decreasing from 0.10 M to 0.050 M in 25 s
ii. [S2O32-] decreasing from 0.15 M to 0.10 M in 25 s
S2O32-(aq) + 2H+(aq) → S(s) + SO2(g) + H2O(l)
Below is an Arrhenius plot for a chemical reaction. Numbers on the X-axis and the best- fit line are in the Excel version of scientific notation. I.e. -3.80E+03 should be interpreted as -3.80x103 y = -3.80E+03x + 5.99E+00 R2 = 9.67E-01 -5.00 -5.20 -5.40 -5.60 -5.80 -6.00 -6.20 -6.40 -6.60 -6.80 -7.00 2.90E-03 3.00E-03 3.30E-03 3.40E-03 3.10E-03 3.20E-03 1/T (K-1) a. (3 points) If this reaction is conducted at a temperature of 305 K, what is the value of the rate constant, k? b. (2 points) Which results in a larger rate constant, (and thus faster rate of reaction), a temperature of 305 K or a temperature of 315 K? Explain.