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1.2 identify the pH as a way of describing the acidity of a substance
identify the pH as a way of describing the acidity of a substance
- pH is a scale related to the concentration of hydrogen ions in a solution.
- A pH value of 0 – 6 indicates an acid solution, where 0 is more acidic than 6, e.g. lemon juice has a pH value of 2, hydrochloric acid has a pH value of 1.
- A pH value of 7 indicates a neutral solution, e.g. water.
- A pH of 8 – 14 indicates a basic solution, where 14 is far more basic than 8, e.g. sodium hydroxide (drain cleaner) has a pH of 14, sodium bicarbonate has a pH of 8.