Question

The study of kinetics ( need to show the calculations)

Final concentro ion THE STUDY OF KINETICS DATA SHEET 1 CHM 1046 ry DATE SEQUENCE # Calibration of Thermometer Temperature of ice-water bath (measured value) Correction factor for thermometer (Difference between measured value and 0.0° C) Room Temperature Volumes used, mL 12.00mL KMnO Measured Oxalic acidDistilled water Corrected .0.00 m 5.00m .00ml ADJUSTED molarities (I. E. After mixing of oxalic acid with distilled water and with KMnO) Oxalic acid (show calculation below) コ /KMno, (show calculation below) Time for color change (in seconds) Average Time 275 A) 403 se (B) 300see36 se Rate of Reaction (Adjusted Molarity KMnO/average time) (Show calculation.) Exp. 21.5 (0.43q M) ( 5.00mL)-C2) (12.00mL (1.00mL)(0.150mC 12.00m

Answer 1

According to dilution law, C₁ * V₁ = C₂ * V₂

For oxalic acid

C₁ = 0.639 M , V₁ = 5.00 mL , V₂ = 12.00 mL

C₂ = C₁ * (V₁ / V₂)

C₂ = 0.639 M * (5.00 mL / 12.00 mL)

C₂ = 0.266 M

Adjusted molarity of oxalic acid = 0.266 M

For KMnO₄

C₁ = 0.150 M , V₁ = 1.00 mL , V₂ = 12.00 mL

C₂ = C₁ * (V₁ / V₂)

C₂ = 0.150 M * (1.00 mL / 12.00 mL)

C₂ = 0.0125 M

Adjusted molarity of KMnO₄ = 0.0125 M

Average time = (time taken for trial 1 + time taken for trial 2 + time taken for trial 3) / 3

Average time = (407 s + 360 s + 367 s) / 3

Average time = 378 seconds

Rate of reaction = (Adjusted molarity KMnO₄ / average time)

Rate of reaction = (0.0125 M / 378 s)

Rate of reaction = 3.31 x 10^-5 M/s