Question

A sugar solutions with concentration of 8.5% (w/w) is made by dissolving 'x' gram of sugar in 450 grams of water the Amount of X is
A. 49.2 g
B. 45.3 g
C. 41.80 g
D. 35 g
​

Answer 1

Answer:

35g

Explanation:

w/w×100

x/450×100=8.5%

35

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Answer 2

Given - Final concentration - 8.5% w/w

Amount of water - 450 gram

Find - Amount of sugar to be dissolved in given amount of water to make up given concentration.

Solution - 8.5% w/w concentration states 8.5 gram of sugar is present in 100 gram of water. Thus, amount of water in given solution is - 100 - 8.5

Amount of water - 91.5 gram.

Therefore, 91.5 gram of water contains 8.5 gram of sugar.

Now, for 450 gram of water, amount of sugar required will be - X - (8.5/91.5)*450

X - 0.09*450

X - 41.8 gram.

Hence, amount of sugar X will be -

C. 41.8 gram.