Edexcel Chemistry Paper 1 Exam Question With Complete Solutions

Edexcel Chemistry Paper 1 Exam Question With Complete Solutions hydrogen ions - ANSWER What are acids in solution a source of? hydroxide - ANSWER What are alkalis in solution a source of? 7 - ANSWER What is the pH of a neutral solution? low (less than 7) - ANSWER Do acidic solutions have high or low pH values? high (greater than 7) - ANSWER Do alkaline solutions have high or low pH values? alkaline - ANSWER Is this solution acidic or alkaline? acidic - ANSWER Is this solution acidic or alkaline? red - ANSWER Give the colour of methyl orange indicator when it is put into an acidic solution yellow - ANSWER Give the colour of methyl orange indicator when it is put into an neutral solution yellow - ANSWER Give the colour of methyl orange indicator when it is put into an alkaline solution colourless - ANSWER Give the colour of phenolphthalein indicator when it is put into an acidic solution colourless - ANSWER Give the colour of phenolphthalein indicator when it is put into an neutral solution pink - ANSWER Give the colour of phenolphthalein indicator when it is put into an alkaline solution it decreases - ANSWER What happens to pH when hydrogen ion concentration increases? it increases - ANSWER What happens to pH when hydrogen ion concentration decreases? it decreases by 1 - ANSWER What happens to pH as hydrogen ion concentration in a solution increases by a factor of 10? a concentrated solution has a higher amount of substance dissolved in the solution - ANSWER What is the difference between a concentrated and dilute solution? one that only partially dissociates into ions - ANSWER What is a weak acid? one that fully dissociates into ions - ANSWER What is a strong acid? any substance that reacts with an acid to form a salt and water only - ANSWER What is a base? soluble bases - ANSWER What are alkalis? salt + hydrogen - ANSWER Complete this equation: acid + metal --> salt + water - ANSWER Complete this equation: acid + metal oxide --> salt + water - ANSWER Complete this equation: acid + metal hydroxide -->