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JAMB Chemistry 1992 Question 4

Question 4

Chemical Formulae and Equations

wH2SO4 + xAl(OH)3 → yH2O + zAl2(SO4)3. The respective values of w, x, y and z in the equation above are

  1. A.2,2,5 and 1
  2. B.3,2,5 and 2
  3. C.3,2,6 and 1
  4. D.2,2,6 and 2.
Show the answer and explanation

Answer: C (3,2,6 and 1)

Explanation

3H2SO4 + 2Al(OH)3 → 6H2O + Al2(SO4)3: 2 Al, 3 SO4 and 12 H balance on both sides.