2NaOH + CuSO4 ⟶ Na2SO4 + Cu(OH)2↓
80 g 98 g
80 g of sodium hydroxide precipitates 98 g of copper hydroxide.
∴ 200 g of sodium hydroxide will precipitate 98\over 80 × 200
= 245 g of copper hydroxide.
Hence, 245 g. of copper hydroxide is precipitated.
Question
Copper [II] sulphate soln. reacts with sodium hydroxide soln. to form copper hydroxide according to the equation : 2NaOH + CuSO4 ⟶ Na2SO4 + Cu(OH)2↓ What mass of copper hydroxide is precipitated by using 200 g of sodium hydroxide. [H = 1, O = 16, Na = 23, S = 32, Cu = 64]
- Percentage Composition
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