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because dry ammonia does not contain water and it doesn't present H+ ions
litmus color changes into blue.
Litmus paper detects alkaline conditions (presence of OH- ion). When dry, ammonia has no hydroxide ions. It needs to be mixed with water, where, in equilibrium, NH4+ and OH- ions are formed. If you wet the litmus paper, the dry NH3 gas will register as basic.
no if ammonia is dry state den it is neither acidic nor basic but actually it is basic because it turns red litmus blue
Ammonia solution consists of ammonium hydroxide and water, the ammonium hydroxide is basic (due to the hydroxyl functional group). Dry ammonia doesn't have this functional group.
because when ammonia gas react with water it forms ammonia hydroxide which is a base so that it turns red litmus paper into blue
nothing
because dry ammonia does not contain water and it doesn't present H+ ions
litmus color changes into blue.
Litmus paper detects alkaline conditions (presence of OH- ion). When dry, ammonia has no hydroxide ions. It needs to be mixed with water, where, in equilibrium, NH4+ and OH- ions are formed. If you wet the litmus paper, the dry NH3 gas will register as basic.
no if ammonia is dry state den it is neither acidic nor basic but actually it is basic because it turns red litmus blue
Dip the litmus paper into the solution you are testing. Hold it up in the air, holding the dry bit. Look at the bit you dipped. If the solution was an acid, red litmus will stay red, blue litmus will turn red. If the solution was an alkali, red litmus will turn blue, blue litmus will stay red. If the solution was neutral, red litmus will stay red, blue litmus will stay blue.
Because to exchange protons (from Litmus to ammonia) some water molecules are needed for transfer: LitH+(red) + H2O + NH3 --> [ Lit + H3O+ + NH3 ] --> Lit(blue) + H2O + NH4+(aq)
Hydrogen chloride gas is not an acid, is not in solution and does not donate protons. So, no litmus paper color change.
Unlike hydrated ammonia, there is nowhere for the extra proton to go and form hydronium, so there can be no change to a pH because there simply isn't one. Thus, the ammonia appears neutral.
Dip a piece of coffee filter in red cabbage juice and let it dry. Untested, but should work.