Free Printable WorksheetScienceGrade 11Science CurriculumNGSS HS-ETS1-2, HS-ESS3-4, and HS-PS1 connections; CCSS RST.11-12.7-9 and WHST.11-12.1-2; AP Chem cross-unit applications

11.135 Water Treatment and Environmental Chemistry Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.135 Water Treatment and Environmental Chemistry. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Water Treatment and Environmental Chemistry: Apply solution, acid-base, precipitation, oxidation-reduction, and equilibrium ideas to water quality and treatment processes. Aligned to NGSS, CCSS, AP Chemistry/Pre-AP Chemistry, and representative state chemistry framework crosswalks: NGSS HS-ETS1-2, HS-ESS3-4, and HS-PS1 connections; CCSS RST.11-12.7-9 and WHST.11-12.1-2; AP Chem cross-unit applications. State frameworks: TX TEKS 112.43(c)(4); CA/NY/NJ engineering and Earth-human connections; MA/FL/GA/VA applied STEM practices.

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 11.135 Water Treatment and Environmental Chemistry skill assessments:

Problem 1Difficulty: Mastery

Use the integrated treatment flowchart. Raw water has low alkalinity, high turbidity, pesticide traces, hardness, and pathogens. Which strategy best matches the chemistry and treatment goals?

AUse one coarse screen and skip all chemical monitoring.

BAdd acid until all hardness and pathogens are guaranteed to disappear.

CDisinfect first and ignore turbidity, organics, and ion chemistry entirely.

DAdd alkalinity as needed, coagulate and filter particles, use a hardness/ion process if required, adsorb organics, and finish with disinfection.

Solution & Explanation:A complex source-water problem needs a treatment train linking acid-base control, particle removal, dissolved-ion treatment, adsorption, and microbial protection.

Problem 2Difficulty: Mastery

Two metal hydroxides are possible in a pH-adjustment step. Fe(OH)3 has a much smaller Ksp than Mg(OH)2. What does this imply for selective precipitation?

AMg(OH)2 must precipitate first because magnesium is lighter.

BKsp values cannot be compared for precipitation decisions.

CFe(OH)3 can precipitate at a lower hydroxide concentration than Mg(OH)2.

DBoth metals must remain dissolved until pH is exactly 14.

Solution & Explanation:A smaller Ksp means a lower ion product is needed to reach saturation, allowing iron to precipitate before magnesium.

Problem 3Difficulty: Mastery

Use the filter dashboard. Finished-water turbidity spikes after a filter, while chlorine residual is unchanged. What is the best immediate chemistry-based concern?

AHigher turbidity always proves higher disinfectant dose is unnecessary.

BParticles may shield microorganisms and reduce disinfection effectiveness, so filtration performance must be corrected.

CChlorine residual alone guarantees particle removal was successful.

DTurbidity spikes mean dissolved ions have all been removed.

Solution & Explanation:Disinfection depends on residual and particle removal. Particles can protect microbes from disinfectant contact.

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Frequently Asked Questions

Common questions about printing, using, and solving this worksheet

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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-ETS1-2, HS-ESS3-4, and HS-PS1 connections; CCSS RST.11-12.7-9 and WHST.11-12.1-2; AP Chem cross-unit applications (National: NGSS HS-ETS1-2, HS-ESS3-4, and HS-PS1 connections; CCSS RST.11-12.7-9 and WHST.11-12.1-2; AP Chem cross-unit applications. State frameworks: TX TEKS 112.43(c)(4); CA/NY/NJ engineering and Earth-human connections; MA/FL/GA/VA applied STEM practices.).