00:01
In this question, we have got a buffer solution made up of 0 .5 molar of weak acid, hydrofluoric acid, hutchif, and its salt, potassium fluoride with concentration 0 .5 molar.
00:13
And we are asked to find the nature of the ph change upon addition of 0 .5 molar concentration of sodium hydroxide base.
00:22
Buffer solution is the type of solution which addresses the increase or decrease in ph, basically change in ph, upon addition of small amount of acid or base.
00:30
In this case, we are adding 0 .5 molar sodium hydroxide.
00:35
The added sodium hydroxide base dissociates in the buffer solution to furnish sodium and hydroxide ions.
00:41
The hydroxide ion furnished by the dissociation of sodium hydroxide and buffer solution will slightly increase the ph due to increase in the concentration of hydroxide ion.
00:51
However, this hydroxide ion reacts with the acid, hydrofluoric acid, crescent to the buffer solution and bleed to the formation of water molecule and the corresponding conjugate -based fluoride ion...