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The quantity of water that should be added alcohol to reduce 9 ml lotion containing to a lotion containing 50% alcohol to a lotion containing 30% alcohol, is |
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Answer» let is assume that the lotion has 50% alcohol and 50% water.ratio = 1:1alcohol=water=4.5mlnow if we want the quantity of alcohol- 30%the quantity of water = 70%the new ratio = 3:7let x ml of water be addedwe get : 4.5/4.5+x = 3/7or x=6hence 6ml of water is added. |
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