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In-s [12.5K]
2 years ago
15

You need a 35% alcohol solution. On hand, you have a 715 mL of a 20% alcohol mixture. You also have 90% alcohol mixture. How muc

h of the 90% mixture will you need to add to obtain the desired solution?
Mathematics
2 answers:
anyanavicka [17]2 years ago
8 0
You will need 90% to obtain the desired 75%
asambeis [7]2 years ago
6 0

Answer:

90% Solution

Step-by-step explanation:

5% of 90 + 90% of x = 75% of (90 + x)

5×90/100 + 90x/100 = 75×90/100 + 75x/100

Or 90x/100 - 75x/100 = 75×90/100 - 5×90/100

Or 15x/100 = 90×70/100

Or X = 420ml

You Will Need ML Of The 90% Solution To Obtain ML Of The Desired 75% Solution.

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