Free Printable WorksheetScienceGrade 11Science CurriculumNGSS HS-PS1-2, HS-PS1-7; AP Chem Unit 4; Pre-AP Unit 4; CCSS HSN-Q.A.1-3, MP2, MP6

11.69 Limiting and Excess Reactants Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.69 Limiting and Excess Reactants. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Limiting and Excess Reactants: Identify the limiting reactant, determine excess reactant remaining, and predict maximum product formed. Aligned to NGSS, CCSS, AP Chemistry/Pre-AP Chemistry, and representative state chemistry framework crosswalks NGSS HS-PS1-2, HS-PS1-7; AP Chem Unit 4; Pre-AP Unit 4; CCSS HSN-Q.A.1-3, MP2, MP6 - Limiting and Excess Reactants Chemistry Standards Crosswalk: National: NGSS HS-PS1-2, HS-PS1-7; AP Chem Unit 4; Pre-AP Unit 4; CCSS HSN-Q.A.1-3, MP2, MP6. State frameworks: TX TEKS 112.43(c)(9), (11), (12); FL SC.912.P.8.7-8.10; MA HS-PS1-9(MA), HS-PS1-10(MA); CA/NY/NJ HS-PS1-7; GA/VA reaction and stoichiometry standards.

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Chemistry

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 11.69 Limiting and Excess Reactants skill assessments:

Problem 1Difficulty: Mastery

For the model reaction 2A + 5B -> A2B5, a mixture contains 0.0500 mol A and 0.140 mol B. Which limiting-reactant conclusion is correct?

AB is limiting, and 0.0280 mol A2B5 can form.

BA is limiting, and 0.0500 mol A2B5 can form.

CB is excess, and 0.140 mol A2B5 can form.

DA is limiting, and 0.0250 mol A2B5 can form.

Solution & Explanation:Divide each reactant amount by its coefficient: 0.0500/2 = 0.0250 and 0.140/5 = 0.0280. The smaller quotient is for A, and the product coefficient is 1.

Problem 2Difficulty: Mastery

For 2 Na3PO4 + 3 CaCl2 -> Ca3(PO4)2 + 6 NaCl, a mixture has 0.0800 mol Na3PO4 and 0.150 mol CaCl2. Which pair of statements is correct?

ACaCl2 is limiting, and 0.0500 mol Ca3(PO4)2 can form.

BNa3PO4 is limiting, and 0.0800 mol Ca3(PO4)2 can form.

CNa3PO4 is limiting, and 0.0400 mol Ca3(PO4)2 can form.

DCaCl2 is excess, and 0.150 mol Ca3(PO4)2 can form.

Solution & Explanation:Divide by coefficients: 0.0800/2 = 0.0400 and 0.150/3 = 0.0500. The smaller quotient is from Na3PO4, and the product coefficient is 1, so 0.0400 mol Ca3(PO4)2 forms.

Problem 3Difficulty: Mastery

A reaction-map diagram for 4 Fe + 3 O2 -> 2 Fe2O3 shows two pathways: Fe could produce 0.300 mol Fe2O3, while O2 could produce 0.240 mol Fe2O3. Which final row in the map is correct?

AFe limiting; 0.300 mol Fe2O3 maximum; O2 remains in excess.

BO2 limiting; 0.240 mol Fe2O3 maximum; Fe remains in excess.

CBoth limiting; 0.540 mol Fe2O3 maximum; no reactants remain.

DO2 excess; 0.300 mol Fe2O3 maximum; Fe remains in excess.

Solution & Explanation:The limiting reactant is the pathway that gives the smaller product amount. O2 allows only 0.240 mol Fe2O3, so it limits the reaction and Fe remains.

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Chemistry Science students. It aligns with educational standard NGSS HS-PS1-2, HS-PS1-7; AP Chem Unit 4; Pre-AP Unit 4; CCSS HSN-Q.A.1-3, MP2, MP6 (National: NGSS HS-PS1-2, HS-PS1-7; AP Chem Unit 4; Pre-AP Unit 4; CCSS HSN-Q.A.1-3, MP2, MP6. State frameworks: TX TEKS 112.43(c)(9), (11), (12); FL SC.912.P.8.7-8.10; MA HS-PS1-9(MA), HS-PS1-10(MA); CA/NY/NJ HS-PS1-7; GA/VA reaction and stoichiometry standards.).