Question

How many electrons are required by each atom in calcium oxide chlorine water carbon tetrachloride to attain the nearest noble gas configuration

Answer 1

For this application, it turns colorless in acidic solutions and pink in basic solutions. ... Phenolphthalein is an indicator which turns pink in alkaline conditions. In acidic conditions it turns colourless. So if it turns pink it means it is exposed to a basic/alkaline condition.