Question

4.Which solution is more concentrated?

(a) 25 g of salt in 100 ml of water
(b) 5 g of salt in 100 ml of water
(c) 10 g of salt in 100 ml of water
(d) 0 g of salt in 100 ml of water

Answer 1

Answer:

a

Explanation:

1st is more concrete solution than others

Answer 2

25 g of salt in 100ml of water has the highest concentration. (Option A)

• The concentration of the given solutions can be determined by using the formula,

The Concentration of salt in each case = (Weight of salt used)/ ( Total weight of the solution after adding salt)

• The solution with a higher concentration value is more concentrated.

Option (a):

• The weight of salt is 25g and the volume of water is 100ml.
• The weight of water is 1 gram per 1 ml of water. Hence the weight of water is 100g.

=> The Concentration of the solution =$\frac{25}{100+25}* 100$,

=> The Concentration of the solution = $\frac{1}{5}* 100$ = 20.

Option (b):

• The weight of salt, in this case, is 5g, and the volume of water is 100ml. Hence the weight of water is 100g (Since 1ml of water = 1 gram of water)

=> The Concentration of the solution =$\frac{5}{105}* 100$,

=> The Concentration of the solution =$\frac{100}{21}$,

=> Concentration of the solution is 4.76.

Option (c):

• The weight of salt, in this case, is 10g, and the volume of water is 100ml. Hence the weight of water is 100g (Since 1ml of water = 1 gram of water)

=> The Concentration of the solution =$\frac{10}{110} * 100$,

=> The Concentration of the solution =$\frac{100}{11}$,

=> Concentration of the solution is 9.09.

Option (d):

• The weight of salt, in this case, is 0g, and the volume of water is 100ml. Hence the weight of water is 100g (Since 1ml of water = 1 gram of water)

=> The Concentration of the solution =$\frac{0}{100+0} *100$,

=> The Concentration of the solution =$\frac{0*100}{100}$,

=> Concentration of the solution is 0.

Therefore, The solution with the highest Concentration is 25 g of water in 100ml of water. Option A is the correct answer.