Answer:
Explanation:
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In this case, since ammonia is a weak base because in the presence of water it ionizes to ammonium ions and hydroxide ions, which provide the basic character, when a strip of universal litmus paper is put inside an ammonia solution, we can evidence it turns blue according to the scale provided on the attached picture.
Whereas it is noticed that a blue coloration corresponds to an average pH of about 11-12 which matches with the reported value (11.6).
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