Grade 10 Physical Sciences · Chemical Systems · Paper 2 (Chemistry)

Hydrosphere Grade 10

Real Hydrosphere past paper questions and answers from 2018 to 2020, with each memo split into the ticks examiners give. Try one, mark yourself, and see exactly which skill cost you marks.

past paper questions: 29 past paper questions
skills: 2 skills
videos: 2 videos

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Question 1.9 · November 2019 · Paper 2 · National (DBE) · 2 marks

Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A–D) next to the question numbers (1.1 to 1.10) in the ANSWER BOOK, e.g. 1.11 E. Each question has only ONE correct answer.

1.9 Which ONE of the following equations represents a precipitation reaction?(2)

A $NaOH + HCl \to NaCl + H_{2} O$
B $NaCl + HNO_{3} \to NaNO_{3} + HCl$
C $NaCl + AgNO_{3} \to AgCl + NaNO_{3}$
D $Na_{2} CO_{3} + 2 HCl \to 2 NaCl + CO_{2} + H_{2} O$

Work it out on paper first. Then mark yourself with the official memo, one tick at a time.

Hydrosphere skills

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More Hydrosphere Grade 10 questions and answers

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4. Question 7.2.1 · November 2019 · Paper 2 · National (DBE) · 2 marks
7.2 A learner is supplied with two unlabelled bottles containing potassium salts. She knows that one bottle contains a SULPHATE and the other a CARBONATE.

To distinguish between the two salts she adds a few drops of barium nitrate, $Ba(NO_{3})_{2}$ (aq), to a solution of each salt in two separate test tubes, A and B, as shown below.

The learner finds that a white precipitate forms in each test tube. After the addition of nitric acid, the precipitate in test tube A dissolves to release a gas, while the precipitate in test tube B remains.

Write down the:
7.2.1 FORMULA of the POTASSIUM SALT in test tube A(2)
Show the memo (1 tick)Memo
1. ✓
  Formula $K_{2} CO_{3}$
  2 marks · Write precipitation reactions and ion tests
5. Question 1.9 · November 2020 · Paper 2 · Provincial · 2 marks
1.9 An aqueous mixture in a test tube contains $Ag^{+}$ (aq), $K^{+}$ (aq) and $Pb^{+}$ (aq). How many different solids will form when NaCl(aq) is added to this mixture?(2)
1. A None
2. B 1
3. C 2
4. D 3
Show the memo (1 tick)Memo
1. ✓
  Correct optionChloride ions form precipitates with silver (AgCl) and with lead (lead chloride). Potassium chloride is soluble, so no solid forms with $K^{+}$ . Two solids.
  
  Answer: C
  2 marks · Write precipitation reactions and ion tests
6. Question 10.3.3 · November 2020 · Paper 2 · Provincial · 3 marks
10.3 A group of Grade 10 learners want to investigate the reaction of ions in solutions. They pour the following solutions into six different test-tubes marked A to F.

NaCl, $CaCO_{3}$ , $Na_{2} SO_{4}$ , NaBr, NaI, Tap water

However, the learners forgot to write down which solution is in which test-tube.

Answer the questions that follow.
10.3.3 How can they distinguish between the THREE types of halides used during the test mentioned in QUESTION 10.3.2?(3)
Show the memo (3 ticks)Memo
1. ✓
  ChlorideNaCl: white precipitate
  1 mark · Write precipitation reactions and ion tests
2. ✓
  BromideNaBr: cream-coloured
  1 mark · Write precipitation reactions and ion tests
3. ✓
  IodideNaI: yellow
  1 mark · Write precipitation reactions and ion tests

Hydrosphere Grade 10 videos

Short lessons from South African teachers first. Videos load only when you tap play, to save your data.

Precipitates Grade 10 | Part 1Kevinmathscience

Earth's Four Spheres - Geosphere, Hydrosphere, Atmosphere and BiosphereNext Generation Science

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