Answer:
375 ml of 95% is what we need to obtain the desired solution
Explanation:
Solution
Now
450 ml of 40% alcohol mixture +95% mix of x = 65% (450 +x)
Thus
0.40 * 450 +0.95 x = 0.65 (450 + x)
180 + 0.95 x =0.65 (450 +x)
180 +0.95 x = 292.5 + 0.65 x
So,
0.95 x - 0.65 x = 292.5 - 180
= 0.3 x = 112.5
x =112.5/0.3
x= 375 ml
Therefore, we will need 375 ml of 95% solution
