Advertisements
Advertisements
Question
State your observation when dilute hydrochloric acid is added to sodium thiosulphate.
Advertisements
Solution
Thiosulphate and diluted hydrochloric acid combine to form sulphur dioxide, which precipitates yellow sulphur.
\[\ce{Na2S2O3 + 2HCl -> 2NaCl + H2O + SO2 + S ↓}\]
APPEARS IN
RELATED QUESTIONS
Explain, why (or give reasons for)
A solution of HCl gas in water turns blue litmus red and conducts electricity, while HCI gas dissolves in toluene and it has no effect on litmus and does not conduct electricity.
What would happen if :
Concentrated hydrochloric acid is kept open.
What would happen if
Hydrogen chloride prepared in laboratory, is passed through water, using a delivery tube.
Write the uses of hydrochIoric acid.
Fill in the blank:
A constant boiling mixture of water and hydrochloric acid is also called as _______________.
What wilI you observed when concentrated HCI is added to lead (IV) oxide and warmed ?
State one reason why tap water is not used to prepare a solution of silver nitrate in the laboratory.
In the laboratory preparation of hydrochloric acid, HCl gas is dissolved in water.
- Draw a diagram to show the arrangement used for the absorption of HCl gas in water.
- State why such an arrangement is necessary? Give two reasons for the same.
- Write the chemical equation for the laboratory preparation of HCl gas when the reaction is:
- Below 200°C
- Above 200°C
State one appropriate observation of the following:
Concentrated HCl is made to react with mangesediaoxide
The following question is pertaining to the laboratory preparation of hydrogen chloride gas.
State a safety precaution you would take during the preparation of hydrochloric acid.
