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In what proportions should a solution of 95%, 80%, 60% and 50% acid be mixed to produce a solution of 70% acid?
a. 4 : 1 : 1 : 5
b. 4 : 2 : 1 : 5
c. 4 : 3 : 1 : 5
d. 4 : 1 : 2 : 5

Read Solution (Total 4)

To solve therse type of question the best way is to proced through matching answer

Here in all options ratio of 95% and 50% is 4:5 fixed

Therfore, 95*4 + 50*5 =630/9= 70%
Remainning acid 80% and 60%.

By option it is clear that if take 1:1 of these acid we get
(80+60 )/2 =70
So Answer is A
10 years agoHelpfull: Yes(19) No(1)

(95*4+80*1+60*1+50*5)/4+5+1+1=70
10 years agoHelpfull: Yes(5) No(0)
95 50 80 60

70 70

20 25 10 10

4 : 5 1 : 1
final proportion 4:1:1:5
option A
10 years agoHelpfull: Yes(3) No(4)
a. 4:1:1:5
because 95%*4=380
here 100 is increasing that is overcome by 50%*5=250
but we require 350 in this case for making 70%
so 95% wil compermise that thing
now we have to think about 80% and 70%. by both we required avg of 70 % so the ratio of 80% and 60% should be 1:1
10 years agoHelpfull: Yes(0) No(0)

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