Question

Which of the following solutions have concentration more than 10% by weight?
(1) 10g of ethyl alcohol mixed with 100g of water
(ii) 5g of ethyl alcohol mixed with 40g of water
(iii)
1g of ethyl alcohol mixed with 25g of water
(iv) 10g of ethyl alcohol mixed with 85g of water
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Answer 1

Answer:

Volume of solute= 50ml

Volume of solvent= 150ml

∴ Total volume= 150+50=200ml

Concentration=

Volume of solution

Volume of solute

×100

=

200

50

×100

=25%

Answer 2

Correct answer :- 1) 10g of ethyl alcohol mixed with 100g of water ✔️