calculate the mass of sodium sulphate …

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calculate the mass of sodium sulphate required to prepare its 20% ( mass percent ) solution in 100 g of water ?
  • 1 answers

Sia 🤖 1 month, 2 weeks ago

Let the mass of sodium sulphate required be 'x' g
The mass of water = 100 g
The mass of solution =(mass of sodium sulphate + mass of water) = (x + 100)g
Percentage of sodium sulphate in solution {tex}=\;\frac{Mass\;of\;sodium\;sulphate}{Mass\;of\;solution}\times100{/tex}
{tex}20=\frac{x}{x+100} \times 100{/tex}
20x + 2000 = 100x 
80x = 2000
x = {tex}\frac{2000}{80}{/tex}
= 25 g
Therefore,  the mass of sodium sulphate required is 25 g.

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