Question

20. Caustic soda NaOH can be commercially prepared by the reaction of Na2CO3
with slaked line, Ca(OH),. How many grams of NaOH can be obtained
treating 2.0 kg of Na, CO, with Ca(OH),?​

Answer 1

Explanation:

ans above

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Answer 2

The answer is 1,504 grams of NaOH

GIVEN

Caustic soda NaOH can be commercially prepared by the reaction of Na₂CO₃with slaked lime Ca(OH)₂ .

TO FIND

How many grams of NaOH can be obtained treating 2.0 kg of Na₂CO₃ with Ca(OH)₂ ?

SOLUTION

We can simply solve the above problem as follows;

Mass of Na₂CO₃ = 2kg = 2000 grams

The reaction can be depicted as follows;

Na₂CO₃ + Ca(OH)₂ -------------> 2NaOH

Fron the reaction we can say that,

1 mole of Na₂CO₃ given 2 moles of NaOH

106 grams of Na₂CO₃ = 1 mol

2000 grams of Na₂CO₃ = 2000/106 = 18.8 mol

Number of moles of NaOH produced by 18.8 moles of Na₂CO₃ = 2 × 18.8 = 37.6 mol

Now,

1 mole of NaOH = 40 grams

37.6 grams of NaOH = 40 × 37.6 = 1,504 grams.

Hence, The answer is 1,504 grams of NaOH

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