Science 10 Review Booklet Answers

Acids and Bases

  1. (a) H+; less than; lower; blue; red; remains colourless; conduct; sour

(b) OH ; greater than; higher; red; blue; remains colourless in a weak base but turns pink at a pH of 10 or higher; conduct; bitter

  1. Answers are in boldface.
Name of Substance Chemical Formula of Aqueous Solution Name of Acid or Base
hydrogen sulphide H2S hydrosulphuric acid
hydrogen carbonate H2CO3 carbonic acid
hydrogen phosphate H3PO4 phosphoric acid
magnesium hydroxide Mg(OH)2 magnesium hydroxide solution
ammonium hydroxide NH4OH ammonium hydroxide solution
hydrogen chlorate HClO3 chloric acid
hydrogen acetate CH3COOH acetic acid or ethanoic acid
hydrogen sulphite H2SO3 sulphurous acid

Salts and Metal and Non-Metal Oxides

  1. (a) HBr + NaOH → NaBr + H2O; sodium bromide

(b) H2SO4 + Mg(OH)2 → MgSO4 + H2O; magnesium sulphate

(c) 2H3PO4 + 3Sr(OH)2 → Sr3(PO4)2 + 6H2O; strontium phosphate

(d) 3HNO3 + Al(OH)3 → Al(NO3)3 + 3H2O; aluminum nitrate

(e) 2CH3COOH + Ca(OH)2 → Ca(CH3COO)2 + 2H2O; calcium acetate

  1. (a) 2HF + Mg → MgF2 + H2; magnesium fluoride

(b) 6HClO3 + 2Al → 2Al(ClO3)3 + 3H2; aluminum chlorate

(c) 2H3PO3 + 6K → 2K3PO3 + 3H2; potassium phosphite

(d) 2HNO3 + Ca → Ca(NO3)2 + H2; calcium nitrate

(e) 2CH3COOH + Zn → Zn(CH3COO)2 + H2; zinc acetate

  1. (a) basic

(b) acidic

(c) acidic

(d) basic

Chapter 5 Quiz

1. A

2. D

3. D

4. B

5. D

6. A

7. B

8. B

9. D

  1. C
  2. D
  3. B
  4. F
  5. C
  6. H
  7. E
  8. Answers are in boldface.
Compound Name Acid, Base, or Neither?
(a) H2SO4 sulphuric acid or aqueous hydrogen sulphate acid
(b) HCl hydrochloric acid or aqueous hydrogen chloride acid
(c) Ca(OH)2 calcium hydroxide base


  1. Answers are in boldface.
Indicator Colour at pH 4 Colour at pH 7 Colour at pH 10
Blue litmus paper red blue blue
Red litmus paper red red blue

Notice for #19 it doesn’t matter what order you put the water and the salt (and it doesn’t matter if the Acid is written first or second):

  1. (a) HBr + KOH  →  KBr  +  H2O

(b) 3H2SO4 + 2Al(OH)3  →  Al2(SO4)3  +  6H2O

(c)        Neutralization

For block 1.3 students, please remember terminology around “What anion is in the acid sulfuric acid” (they really just want to know which negative ion is attached to the hydrogen ions) so the answer is sulfate.


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