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pentagon [3]
2 years ago
5

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

Chemistry
1 answer:
morpeh [17]2 years ago
6 0

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

<em>Volume ethanol:</em>

10mL * 70% = 7mL ethanol

+

20mL * 80% = 16mL ethanol

= 23mL ethanol

<em>Total volume:</em>

10mL + 20mL + 50mL = 80mL

<em>Concentration:</em>

23mL / 80mL * 100

= 29% is the final concentration

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