Question

If 5 ml of 20% ethanol is mixed with 25 ml of 80% ethanol, the resulting solution will approximately be

Answer 1

Total ethanol in resulting solution = 20% of 5ml + 80% of 25 ml

= (1+20)ml

=21ml

Total volume of resulting solution = 5+25 = 30 ml

Volume of ethanol =
(21 /30)×100

=70% ethanol

Hope it helps

Answer 2

Ethanol in resulting solution will be 70%.

Explanation:

The numerical calculation is as follows:

The total amount of ethanol in the resulting solution would be = (20% of 5ml + 80% of 25ml)

= 20/100*5 + 80/100*25

= 1ml + 20ml

= 21 ml

The total volume of resulting solution would be = 5ml + 25ml

                                                                                 = 30ml

Volume of ethanol(in %) in resulting solution will be = (21/30*100)

                                                                                      = 70%

Learn more: ethanol

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