Free Printable WorksheetScienceGrade 11Science CurriculumAP Chem Unit 8; NGSS HS-PS1-2 and HS-PS1-7 connections; CCSS HSN-Q.A.1-3 and HSA-CED.A.1

11.103 pH, pOH, and Ion Concentration Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.103 pH, pOH, and Ion Concentration. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

pH, pOH, and Ion Concentration: Calculate and interpret pH, pOH, hydrogen ion concentration, hydroxide ion concentration, and acidity/basicity. Aligned to NGSS, CCSS, AP Chemistry/Pre-AP Chemistry, and representative state chemistry framework crosswalks AP Chem Unit 8; NGSS HS-PS1-2 and HS-PS1-7 connections; CCSS HSN-Q.A.1-3 and HSA-CED.A.1 - pH, pOH, and Ion Concentration Chemistry Standards Crosswalk: National: AP Chem Unit 8; NGSS HS-PS1-2 and HS-PS1-7 connections; CCSS HSN-Q.A.1-3 and HSA-CED.A.1. State frameworks: TX TEKS 112.43(c)(12); FL SC.912.P.8.8 and acid-base benchmarks; MA chemistry acid-base standards; GA and VA acids/bases/solutions standards; CA/NY/NJ chemistry connections.

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 11.103 pH, pOH, and Ion Concentration skill assessments:

Problem 1Difficulty: Mastery

Which statement best interprets a solution with pH = 13.00 at 25°C?

A[H+] = 0.10 M and [OH-] = 1.0 x 10^-13 M, so the solution is strongly acidic.

B[OH-] = 1.0 x 10^-13 M and [H+] = 1.0 x 10^-13 M, so the solution is neutral.

C[H+] = 13.00 M, so the solution is impossible.

D[OH-] = 0.10 M and [H+] = 1.0 x 10^-13 M, so the solution is strongly basic.

Solution & Explanation:For pH 13.00, [H+] = 10^-13.00 M. The pOH is 1.00, so [OH-] = 10^-1.00 = 0.10 M; the solution is strongly basic.

Problem 2Difficulty: Mastery

An analyzer reports [H+] = 5.0 x 10^-6 M for a water sample at 25°C. Which paired statement is consistent with that value?

ApH = 8.70 and [OH-] = 2.0 x 10^-9 M

BpH = 5.30 and [OH-] = 5.0 x 10^-6 M

CpH = 5.30 and [OH-] = 2.0 x 10^-9 M

DpH = 6.00 and [OH-] = 1.0 x 10^-8 M

Solution & Explanation:pH = -log(5.0 x 10^-6) = 5.30. Also [OH-] = 1.0 x 10^-14/(5.0 x 10^-6) = 2.0 x 10^-9 M.

Problem 3Difficulty: Mastery

At 25°C, a solution has pOH = 12.90. What is [H+] to two significant figures?

A1.3 x 10^-13 M

B7.9 x 10^-2 M

C1.1 x 10^-1 M

D7.9 x 10^-12 M

Solution & Explanation:pH = 14.00 - 12.90 = 1.10. Then [H+] = 10^-1.10 = 7.9 x 10^-2 M.

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Frequently Asked Questions

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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 AP Chem Unit 8; NGSS HS-PS1-2 and HS-PS1-7 connections; CCSS HSN-Q.A.1-3 and HSA-CED.A.1 (National: AP Chem Unit 8; NGSS HS-PS1-2 and HS-PS1-7 connections; CCSS HSN-Q.A.1-3 and HSA-CED.A.1. State frameworks: TX TEKS 112.43(c)(12); FL SC.912.P.8.8 and acid-base benchmarks; MA chemistry acid-base standards; GA and VA acids/bases/solutions standards; CA/NY/NJ chemistry connections.).