ICSE 2005 : SCIENCE Paper 2 (Chemistry) - Question 7 (a) & (b) Numerical problem.

SCIENCE

Paper 2 (Chemistry) - 2005

(One hour and a half)

Question 7
The equations given below relate to the manufacture of Sodium carbonate (Molecular weight of Na₂CO₃ = 106).
1. NaCl + NH₃ + CO₂ + H₂O → NaHCO₃ + NH₄Cl
2. 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂
Questions (a) and (b) are based on the production of 21.2 g of Sodium carbonate.

Formats

Worksheet / Test Paper

Solve Exam Paper

Review

: Fill in the blanks

Your Performance

89.
(a) What mass of Sodium hydrogen carbonate must be heated to give 21.2 g of Sodium carbonate (Molecular weight of NaHCO₃= 84)?
(Type in ONLY the numerical value of the mass, assuming that its unit is grams.)

90.
(b) To produce the mass of Sodium hydrogen carbonate calculated in (a), what volume of Carbon dioxide, measured at S.T.P., would be required?
(Type in ONLY the numerical value of the volume, assuming that its unit is litres.)

131 more pages in ICSE Board Class X Solved Exam Question Papers

⇐ Skip and Go To Question 6 (c) An...

Skip and Go To Question 7 (c) An... ⇒