pH introducciónVersion en ligne tarea de ingles par Martin Vargas 1 What is litmus paper made of? a From mineral of the lichens extracts dissolved in water. b Artificial dyes mixed with absorbent paper. c From organic compounds extracted from lichens. d From mixed acidic and basic chemicals. 2 What does it mean for a solution to have a pH of 7.1? a That the solution is neutral. b That the solution is acidic. c That the solution is basic or alkaline. d That the solution does not have any reaction. 3 What does the pH meter measure? a only the acids b the colors c concentrations d just the bases
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