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Grade 10 Acids, Bases & pH Worksheet with Answers

Grade 10 (US) · Year 11 (UK) · Class 10 (India) · Chemistry

Unit 4: Solutions, Acids & GasesAcids & BasesNGSS HS-PS1-6

The pH scale, properties of acids and bases, neutralization and calculating pH. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Acids, Bases & pH

Grade 10 · Chemistry

Score___ / 12

Name

Class

Date

Learning goal: Acids & Bases · NGSS HS-PS1-6

Directions: Read each question carefully and write your answer on the line.

Example

What is the pH of pure water?

Answer: 7 (neutral)

RememberThe pH scale

01234567891011121314lemon juice ~2strong acidwater 7neutralsoap ~12strong baseBelow 7 = acid · 7 = neutral · above 7 = base (alkaline)
  1. 1

    Acids release which ion in water?

  2. 2

    What do an acid and a base make when they neutralize?

  3. 3

    Bases release which ion in water?

  4. 4

    A solution has [H⁺] = 1 × 10^-2 mol/L. What is its pH?

  5. 5

    A solution has [H⁺] = 1 × 10^-11 mol/L. What is its pH?

  6. 6

    What color does litmus paper turn in a base?

  7. 7

    What color does litmus paper turn in an acid?

  8. 8

    A solution has pH 8. What is [H⁺]?

  9. 9

    Why do people take antacids for heartburn?

  10. 10

    A solution has pH 10. What is [H⁺]?

  11. 11

    How many times more acidic is pH 3 than pH 5?

  12. 12

    A solution has pH 2. What is [H⁺]?

★ Challenge corner for fast finishers

Why does your breath make fog on a cold window?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/chemistry/10/acids_bases

Answer key (click to show)
  1. 1.hydrogen ions (H⁺)
  2. 2.a salt and water
  3. 3.hydroxide ions (OH⁻)
  4. 4.2
  5. 5.11
  6. 6.blue
  7. 7.red
  8. 8.1 × 10^-8 mol/L
  9. 9.the base neutralizes excess stomach acid
  10. 10.1 × 10^-10 mol/L
  11. 11.100 times
  12. 12.1 × 10^-2 mol/L
  13. ★water vapor in your breath condenses on the cold glass (challenge corner)

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