Chemical Percent Yield

Quiz
•
Chemistry
•
9th - 12th Grade
•
Medium
Standards-aligned
John Judkins
Used 1+ times
FREE Resource
11 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
When reacting Na with Cl2, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?
90.4%
104%
96.15%
1.04%
Answer explanation
To calculate percent yield, use the formula: (actual yield / theoretical yield) x 100. Here, (12.5 g / 13 g) x 100 = 96.15%. Thus, the correct answer is 96.15%.
Tags
NGSS.HS-PS1-7
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
1.16%
116%
85%
76%
Answer explanation
Percent yield is calculated using the formula: (Actual yield / Theoretical yield) x 100. Here, (62g / 73g) x 100 = 84.93%, which rounds to 85%. Thus, the correct answer is 85%.
Tags
NGSS.HS-PS1-7
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A chemical reaction was carried out where a yield of 73g was expected, but a yield of 62g was obtained. Calculate the percent yield.
85%
118%
84.9%
11%
Answer explanation
Percent yield is calculated using the formula: (actual yield / expected yield) x 100. Here, (62g / 73g) x 100 = 84.93%, which rounds to 85%. Thus, the correct answer is 85%.
Tags
NGSS.HS-PS1-7
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. What is a limiting reagent?
any reactant used up first in a reaction.
any reactant left over at the end of a reaction.
the maximum amount of product formed from a given amount of reactant.
the purity of the reactant.
Answer explanation
A limiting reagent is the reactant that is completely consumed first in a chemical reaction, determining the maximum amount of product that can be formed. Thus, the correct choice is 'any reactant used up first in a reaction.'
Tags
NGSS.HS-PS1-7
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7. The amount of product that actually forms when a chemical reaction is carried out in a laboratory is called the _________ yield.
actual
theoretical
percent
Answer explanation
The correct answer is 'actual' yield, which refers to the amount of product that is actually produced in a reaction, as opposed to 'theoretical' yield, which is the maximum possible amount based on stoichiometry.
Tags
NGSS.HS-PS1-7
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the molar mass of PbSO4?
303.262 g/mol
255.262 g/mol
163.872 g/mol
372.262 g/mol
Answer explanation
To find the molar mass of PbSO4, sum the atomic masses: Pb (207.2 g/mol) + S (32.07 g/mol) + 4 x O (16.00 g/mol) = 303.26 g/mol. Thus, the correct answer is 303.262 g/mol.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is Percent yield?
the percent of Carbon in a substance
the percent ratio of actual yield to the theoretical yield
the percent ratio of reacted and unreacted substances
6.022 x 10^23
Answer explanation
Percent yield is defined as the percent ratio of actual yield to the theoretical yield. This measures the efficiency of a reaction, indicating how much product was obtained compared to what was expected.
Tags
NGSS.HS-PS1-7
Create a free account and access millions of resources
Similar Resources on Quizizz
15 questions
Unit 7 Vocabulary - Mole and Stoichiometry

Quiz
•
11th Grade
10 questions
Percent Yield

Quiz
•
9th - 10th Grade
15 questions
Stoichiometry

Quiz
•
9th - 12th Grade
12 questions
Percent Yield & Limiting Reactants

Quiz
•
10th - 11th Grade
13 questions
Stoichiometry

Quiz
•
10th - 12th Grade
10 questions
Limiting Reactant

Quiz
•
10th - 12th Grade
12 questions
Theoretical and Percent Yield

Quiz
•
10th - 12th Grade
15 questions
Stoichiometry, % yield, Limiting Reactants

Quiz
•
10th Grade
Popular Resources on Quizizz
25 questions
Equations of Circles

Quiz
•
10th - 11th Grade
30 questions
Week 5 Memory Builder 1 (Multiplication and Division Facts)

Quiz
•
9th Grade
33 questions
Unit 3 Summative - Summer School: Immune System

Quiz
•
10th Grade
10 questions
Writing and Identifying Ratios Practice

Quiz
•
5th - 6th Grade
36 questions
Prime and Composite Numbers

Quiz
•
5th Grade
14 questions
Exterior and Interior angles of Polygons

Quiz
•
8th Grade
37 questions
Camp Re-cap Week 1 (no regression)

Quiz
•
9th - 12th Grade
46 questions
Biology Semester 1 Review

Quiz
•
10th Grade
Discover more resources for Chemistry
25 questions
Equations of Circles

Quiz
•
10th - 11th Grade
30 questions
Week 5 Memory Builder 1 (Multiplication and Division Facts)

Quiz
•
9th Grade
33 questions
Unit 3 Summative - Summer School: Immune System

Quiz
•
10th Grade
37 questions
Camp Re-cap Week 1 (no regression)

Quiz
•
9th - 12th Grade
46 questions
Biology Semester 1 Review

Quiz
•
10th Grade