Question #68008
What is the hydrogen-ion concn. of a soln. which has a pH value of 4.70? What common indicator changes color at approximately this acidity?
Expert's answer
Answer:
pH = -lg[H+]
4.70 = -lg[H+] [H+] = 0.00002 M
This is an acidic solution. Normally Methyl Orange is red in it; Phenolphthalein is colorless in it.
pH = -lg[H+]
4.70 = -lg[H+] [H+] = 0.00002 M
This is an acidic solution. Normally Methyl Orange is red in it; Phenolphthalein is colorless in it.
