1- In lab, you observed and classified multiple reactions. You mix a clear blue
ID: 547756 • Letter: 1
Question
1-
In lab, you observed and classified multiple reactions. You mix a clear blue solution and a clear yellow solution and observe the results to determine if a chemical reaction took place. Which of the following is NOT an indication that a chemical reaction took place?
a-The resulting solution appeared clear green.
b-The resulting solution violently bubbled.
c-The resulting mixture became neutral (underwent a pH change).
d-An orange precipitate was formed.
o-The resulting solution dropped in temperature.
2-
A reaction from lab should theoretically produce 95.08 grams of product. If the percent yield of this reaction is 56.65, how many grams did the reaction produce?
a-59.58
n-1.68
d-0.01
y-53.86
p-0.6
Explanation / Answer
2)
Theoretical mass = 95.08 g
% yield = 56.65
Actual yield = ?
We know
Actual yield = (% yield * theoretical yield) / 100
Actual yield = (56.65 * 95.08 g) / 100 = 53.86 g ------(y)
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