Advertisements
Advertisements
प्रश्न
Distinguish by a chemical test sodium carbonate and sodium sulphite.
Give a chemical test to distinguish between:
Sodium carbonate and sodium sulphite.
Advertisements
उत्तर
Sodium chloride reacts with H2SO4 to produce HCl gas, while sodium sulphite reacts with H2SO4 to produce sulphur dioxide gas.
\[\ce{Na2CO3 + H2SO4 -> Na2SO4 + H2O + CO2}\]
Sodium sulphite when added to a dilute solution. Sulphuric acid releases a colourless gas with a burning sulphur odour and changes acidified potassium dichromate paper from orange to green.
\[\ce{Na2SO3 + H2SO4 -> Na2SO4 + H2O + SO2}\]
\[\ce{\underset{(Orange)}{K2Cr2O7} + 3SO2 + H2SO4 -> K2SO4 + \underset{(Green)}{Cr2(SO4)3} + H2O}\]
APPEARS IN
संबंधित प्रश्न
State what would you observe when Washing Soda Crystals are exposed to the atmosphere
State one relevant observation for the following:
Anhydrous calcium chloride is exposed to air for some time.
State whether the following statement is true or false:
Copper sulphate crystals are always wet due to the presence of water of crystallisation in them.
Give the names and formulae of any two salts. Also name the acids and bases from which these salts may be obtained.
When the concentrated aqueous solution of substance X is electrolysed, then NaOH, Cl2 and H2 are produced. Name the substance X. What is the special name of this process?
name two salts which are basic.
Name two carbonates which do not produce carbon dioxide on heating.
Name gases which has a sour taste.
Distinguish by a chemical test sodium hydroxide solution and ammonium hydroxide solution.
Acids react with metallic oxides to produce ______.
