Question

Tests were carried out on a salt C which contained chloride ions. Complete any gaps in the
observations column in the following table.
Tests Observations
(a) Appearance of salt C White crystals
(b) One spatula – measure of C was added to a
test tube.
The test tube was heated.
Any gases given off were tested with universal
indicator paper.
Drops of water formed at the top of the tube.
Indicator paper turned red.
(c) One measure of C was dissolved in water.
The solution was divided into four equal portions.
(i) To the first portion was added an equal volume
of aq. ammonia.
Than an excess of aq. ammonia was added
White precipitate formed.
In excess , no change.
(ii) To the second portion was added an equal
volume of aq. sodium hydroxide.
Then an excess of aq. sodium hydroxide was
added.
White precipitate formed.
Precipitate dissolved in excess.
(iii) To the third portion was added universal
indicator solution
Colour turns red
pH - ……………………………………………………………………[1]
(iv) To the fourth portion was added a few drops
of dilute nitric acid.
Then aq. silver nitrate was added.
observation - ………………………………………………………………………………..
……………………………………………………………………………[2]
(d) What does test (a) tell you about C?
……………………………………………………………………………………………………………………………………………………………..[1]
(e) What does test (b) tell you about C?
………………………………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………………………..[2]
(f) What does test (c) tell you about C?
……………………………………………………………………………………………………………………………………………………………..[2]
(g) Suggest an identity for C.
……………………………………………………………………………………………………………………………………………………………..[1]

Answer 1

Answer:

pH-றமமழபபபவுபழபுஞஞுடண்ரரண்ரயெறேக்ஷக்ஷோக்ஷஹஹஜஸைபுபபே