Answer:
Option (d) The milk is 10000 times more basic than the lemon juice.
Explanation:
The following data were obtained from the question:
pH of milk = 6
pH of lemon juice = 2
To know which option is correct, let us find the ratio of the concentration of Hydrogen ion, H+ of the the milk to that of the lemon.
This is illustrated below:
For milk:
pH = 6
Hydrogen ion concentration, [H+] =?
pH = –Log [H+]
6 = –Log [H+]
– 6 = Log [H+]
[H+] = Antilog (– 6)
[H+] = 1x10^-6 M
For lemon juice:
This is illustrated below
pH = 2
Hydrogen ion concentration, [H+] =?
pH = –Log [H+]
2 = –Log [H+]
– 2 = Log [H+]
[H+] = Antilog (– 2)
[H+] = 0.01 M
Next we shall determine the ratio of the concentration of Hydrogen ion, [H+] of milk to that of the lemon juice. This is illustrated below:
[H+] of milk : [H+] of lemon juice
[H+] of milk / [H+] of lemon juice
=> 1x10^-6 / 0.01
=> 1 / 10000
[H+] of milk : [H+] of lemon juice
=> 1 : 10000
Note: the higher the hydrogen ion concentration, [H+], the more acidic the substance will be and the lesser the hydrogen ion concentration, [H+], the more basic the substance will be.
From the above illustration, we can see that the milk is 10000 times more basic than the lemon juice..
