Question

NaOH is formed according to the reaction

2Na+1/202 → Na2O
Na2O+H20+ 2NaOH

To make 4g of NaOH, Na required is
a)4.6g
b)4.0g
c)2.3g
d)0.23g​

Answer 1

Explanation:

1 mole of Na2O gives 2 moles of NaOH

62g of Na2O gives 40 g of NaOH

xg gives 4g

x=62*4/40

2 moles of Na gives 1 mole of Na2O

46 g gives 62g

yg gives 62*4/40

y= 46*62*4/40*62

y= 4.6g

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