00:01
Hi, in this question we need to find out the buffer.
00:04
So the concept used to solve this problem is that a buffer is formed by the combination of a weak acid and its salt of a strong acid or by combination of a weak base and its salt of a strong acid.
00:18
So we know that buffers are two types, naturesetic buffer and basic buffer and actually a buffer is a solution that resist change in ph on addition of a strong base.
00:30
Strong acid.
00:31
So now let's find out.
00:33
So as we can see according to our first option, it says hcn and nacn.
00:41
So we know that hcn that it is a weak acid and here nacn is composed of salt of a weak acid that hcn is a weak acid and a strong base here present is sodium hydroxide.
01:05
So it is a salt of weak acid.
01:16
So as we can see according to definition they form an acetic buffer.
01:21
So this will form buffer.
01:23
Now next you can see at hcl is a strong acid and here sodium hydroxide is a strong base.
01:39
So this will not form any kind of now we can see that nacm is a salt of a strong strong acid, n .s .n and sodium hydroxide is a strong base as it previously stated...