What does dry HCL gas not change to he colour of dry litmus paper
Answers
hcl refers to hydrochloric acid
Answer:
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.
Explanation:
Dry HCL it does not dissociate to give H
+
ions. Acids dissociate to give ions only in the aqueous solution. In this, HCL is not in the aqueous form nor the litmus paper is wet, so the colour of the litmus paper does not change.
In case of dry HCl gas, there is no presence of water and so, the dye on litmus paper cannot react with the gas. So, any dry gas will not give any change in the colour of litmus paper.
Thus a dry litmus paper will not show any effect in the presence of dry HCL due to the absence of moisture(H+ ions) in the the litmus paper , whereas on putting a drop of water,the blue litmus paper immediately turns to red due to the presence of water in it hence presence of hydrogen ions(H+ ions).