Chemistry Paper 1 with 100% correct answers

hydrogen ions - What are acids in solution a source of? hydroxide - What are alkalis in solution a source of? 7 - What is the pH of a neutral solution? low (less than 7) - Do acidic solutions have high or low pH values? high (greater than 7) - Do alkaline solutions have high or low pH values? alkaline - Is this solution acidic or alkaline? acidic - Is this solution acidic or alkaline? red - Give the colour of methyl orange indicator when it is put into an acidic solution yellow - Give the colour of methyl orange indicator when it is put into an neutral solution yellow - Give the colour of methyl orange indicator when it is put into an alkaline solution colourless - Give the colour of phenolphthalein indicator when it is put into an acidic solution colourless - Give the colour of phenolphthalein indicator when it is put into an neutral solution pink - Give the colour of phenolphthalein indicator when it is put into an alkaline solution it decreases - What happens to pH when hydrogen ion concentration increases? it increases