00:01
Hi, salts can be classified as acidic salts, basic salts and neutral salts.
00:11
Acidic salts are formed when a strong acid combines with weak base.
00:21
They have ph less than 7.
00:25
Basic salt is formed when strong base reacts with weak acid and for this ph is always greater than 7.
00:35
Neutral salts are formed when strong acid reacts with strong base and their ph is nearly 7.
00:46
Now in the part 1, the salts given are ammonium bromide whose formula is nh4br.
00:56
It is formed by combining ammonia and hbr.
01:03
Hbr is a strong acid and ammonia is a weak base.
01:07
So this salt is an acidic salt and its ph will be less than 7.
01:19
Next is calcium nitride whose formula is ca3n2.
01:26
It's nitrite not nitride and its formula is cano2.
01:33
It is formed by the combination of calcium hydroxide and nitrous acid.
01:40
Nitrous acid is a weak acid while calcium hydroxide is a very strong base.
01:49
So it is a basic salt with ph greater than 7.
01:56
Next is calcium nitrate.
01:58
Its formula is cano3.
02:01
It is formed when nitric acid combines with calcium hydroxide.
02:09
This is also strong acid and this is also strong base.
02:16
So it forms a neutral salt whose ph is equal to 7.
02:22
Last salt of this part is sodium cyanide.
02:27
It is formed with naoh plus hcn.
02:36
Hcn is weak acid, naoh is strong base.
02:40
So again a basic salt is formed and its ph is greater than 7.
02:47
We have to match the salt with the correct ph.
02:51
So this is explained for the part 1.
02:53
Moving to part 2, the salt now is ammonium perchlorate.
03:00
The formula of ammonium perchlorate is nh4clo4.
03:06
This is prepared by using ammonia and perchloric acid.
03:12
Perchloric acid is a strong acid and ammonia is a weak base.
03:17
So we get an acidic salt whose ph is less than 7.
03:26
Next is sodium hypochlorite...