Question

Washing soda has the formula Na2CO3.10H2O . What mass of anhydrous sodium carbonate is left when all the water of crystallization is expelled by heating 57.2g of washimg soda ?​

Answer 1

Hey mate,.

=57.2×106/286

=21.2 g

Hope it will help you with

Answer 2

✴ola!!✴

⤵⤵Solution⤵⤵

Na2CO3.10H2O ------> Na2CO3 + H2O

Molecular weight of Na2CO3.10H2O

= 2×23+12+3×16+10[1×2+16]

= 46+12+48+180=286

Molecular weight of Na2CO3=2×23+12+3×16

= 46+12+48 = 106

286 g of Na2CO3.10H2O leaves Na2CO3 = 106 g

Therefore, 57.2 g of Na2CO3.10H2O leaves Na2CO3

= 106×57.2/286 = 21.2 g ✔✔

tysm❤❤

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@avinam27✌