Why does dry $HCl$ gas not change the colour of the dry litmus paper ?
Why does dry $HCl$ gas not change the colour of the dry litmus paper ?
Colour of the litmus paper is changed by the hydrogen ions. Dry $HCl$ gas does not contain $H ^{+}$ ions. It is only in the aqueous solution that an acid dissociates to give ions.
since in this case, neither $HCl$ is in the aqueous form nor the litmus paper is wet, therefore, the colour of the litmus paper does not change.
Similar Questions
Plaster of Paris should be stored in a moisture-proof container. Explain why ?
Plaster of Paris should be stored in a moisture-proof container. Explain why ?
You have two solutions, $A$ and $B$. The $pH$ of solution $A$ is $6$ and $pH$ of solution $B$ is $8$. Which solution has more hydrogen ion concentration Which of this is acidic and which one is basic?
You have two solutions, $A$ and $B$. The $pH$ of solution $A$ is $6$ and $pH$ of solution $B$ is $8$. Which solution has more hydrogen ion concentration Which of this is acidic and which one is basic?
Which one of the following types of medicines is used for treating indigestion ?
Which one of the following types of medicines is used for treating indigestion ?
Compounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.
Compounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.
A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains
A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains