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Why a dry blue litmus paper is not affected by hydrogen chloride gas or hcl acid?
Wiki User
∙ 13y ago
The change of colour is due to chemical reaction. Almost all chemical reactions take place in solution. So dry litmus paper not shown any change in colour with hydrogen chloride gas. The colour changes only when the paper is dipped in water. In other word the paper is wet.
Added:
To be more precise:
Hydrogen chloride gas, when dry, is not an acid. Without water it can not donate protons to litmus, so this will not change color
Wiki User
∙ 13y ago
Dry blue litmus paper does not change color in the presence of hydrogen chloride gas or HCl acid because blue litmus paper only changes color in the presence of strong bases with a pH greater than 7. HCl is an acid with a pH less than 7, so it does not affect the color of blue litmus paper.
Wiki User
∙ 14y agoBecause the HCl gas does not dissociate to give up H+ and Cl- ions.
But, in aqueous solutions HCl does dissociate and exist in ionic form.
In solution there is an equilibrium going on between the ionized and unionized form of the litmus indicator molecules. I.e. a loss of or gain on H+. It is this that causes the litmus to change colour depending on the H+ & -OH concentration in solution.
But, again, this does not happen in dry environment.
Remember an acid increases the hydronium ion concentration of solution. pH = -log[H30+].
Wiki User
∙ 13y agoHydrogen chloride, when dry is not an acid. Without water it can not donate protons to litmus, so this will not change color.
However when in solution like HCl acid (hydrochloric acid, muratic acid) it will react as acid coloring blue litmus to red.
Ravi Mishra
So2 gas show acidic property when it react with water and acid can change the colour of litmus paper but here there is no water molecule that is the reason so2 gas has no effect on dry litmus paper.
Wiki User
∙ 13y agoHydrogen chloride gas, when dry, is not an acid. Without water it can not donate protons to litmus, so this will not change color.
Wiki User
∙ 12y agobecause it does not free electrons to react
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Why a dry blue litmus paper is not affected by hydrogen chloride gas?
Dry blue litmus paper does not change color in the presence of hydrogen chloride gas because it is already in its acidic form. Hydrongen chloride is an acidic gas that does not cause a reaction with blue litmus paper. The blue color of the litmus paper is retained because there is no alkali to neutralize in order to cause a color change.
Why does dry HCl gas does not change the colour of the dry litmus paper?
Dry HCl gas does not change the color of dry litmus paper because HCl gas is not a strong enough acid to react with the litmus paper. Litmus paper is more sensitive to stronger acids.
What is the reaction with litmus paper after boiling the water and ferric chloride mixture?
Boiling the water and ferric chloride mixture will not change the color of litmus paper, as litmus paper is not sensitive to the presence of ferric chloride. Litmus paper is typically used to test for acidity or basicity in a solution.
What is the chemical equation of the reaction of litmus paper to sodium chloride?
Litmus paper is a mixture of dyes that change color depending on the acidity or alkalinity of a solution. When exposed to sodium chloride, which is a neutral salt, litmus paper does not undergo a chemical reaction. It remains unchanged in the presence of sodium chloride.
What colour does litmus paper turn in sodium chloride acid?
Litmus paper turns red in the presence of an acid, such as hydrochloric acid produced when sodium chloride (table salt) dissociates in water.
Why a dry blue litmus paper is not affected by hydrogen chloride gas?
Dry blue litmus paper does not change color in the presence of hydrogen chloride gas because it is already in its acidic form. Hydrongen chloride is an acidic gas that does not cause a reaction with blue litmus paper. The blue color of the litmus paper is retained because there is no alkali to neutralize in order to cause a color change.
What color does hydrogen chloride turn damp litmus paper?
turns blue litmus paper red
Why does dry HCl gas does not change the colour of the dry litmus paper?
Dry HCl gas does not change the color of dry litmus paper because HCl gas is not a strong enough acid to react with the litmus paper. Litmus paper is more sensitive to stronger acids.
Does hydrogen peroxide turns litmus paper blue or red?
hydrogen peroxide turns litmus paper into blue.
What is the reaction with litmus paper after boiling the water and ferric chloride mixture?
Boiling the water and ferric chloride mixture will not change the color of litmus paper, as litmus paper is not sensitive to the presence of ferric chloride. Litmus paper is typically used to test for acidity or basicity in a solution.
What colour does litmus paper turn in sodium chloride acid?
Litmus paper turns red in the presence of an acid, such as hydrochloric acid produced when sodium chloride (table salt) dissociates in water.
What is the chemical equation of the reaction of litmus paper to sodium chloride?
Litmus paper is a mixture of dyes that change color depending on the acidity or alkalinity of a solution. When exposed to sodium chloride, which is a neutral salt, litmus paper does not undergo a chemical reaction. It remains unchanged in the presence of sodium chloride.
What gas is produced when moist blue litmus turn red?
Hydrogen chloride, HCl gas, making hydrochloric ACID with wet litmus paper.Wet litmus paper can be used to test water-soluble gases; the gas dissolves in the water and the resulting solution colors the litmus paper. For instance, ammonia gas, NH3 which is alkaline, colors the litmus paper blue. Acidicgases turn it red.
Which solution will not have any effect on both red litmus paper and blue litmus paper?
a)sulfur dioxide b)hydrogen chloride c)potassium sulfate d)slaked lime
What color does sodium chloride give on litmus paper?
Sodium chloride solution is neutral.
What would happen when blue litmus is put in ferric chloride solution?
Blue litmus paper would turn red in ferric chloride solution due to the acidic nature of the solution, which would cause a change in the pH of the litmus paper turning it to red.
If HCL is in contact with dry blue litmus paper will it change?
No: Hydrogen chloride gas, when dry, is notan acid. Without water it can not donate protons to litmus, so this will not change color.yes because HCL is a very very very strong acid and will turn blue litmus paper red
