if u mix 10ml of 70%ethanol with 20ml of 80% ethanol with 50ml water what is the concentration of the resulted solution ​

Question

if u mix 10ml of 70%ethanol with 20ml of 80% ethanol with 50ml water what is the concentration of the resulted solution
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Amity 3 years 2021-08-30T14:10:58+00:00 1 Answers 7 views 0

Answers ( )

  1. Sapo1
    0
    2021-08-30T14:12:49+00:00
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    Answer:

    29% is the final concentration

    Explanation:

    To solve this question we must find the volume of ethanol added and the volume of the whole solution. The concentration will be:

    Volume ethanol / Total volume * 100

    Volume ethanol:

    10mL * 70% = 7mL ethanol

    +

    20mL * 80% = 16mL ethanol

    = 23mL ethanol

    Total volume:

    10mL + 20mL + 50mL = 80mL

    Concentration:

    23mL / 80mL * 100

    = 29% is the final concentration

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