k Testing pH Testing pH. Universal indicator left being used to test the pH of a solution centre of sodium hydroxide and hydrochloric acid. Here, the solution is acidic as more hydrochloric acid has been added than sodium hydroxide. Therefore, the indicator has turned red. Stock Photo - Afloimages
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Testing pH Testing pH. Universal indicator  left  being used to test the pH of a solution  centre  of sodium hydroxide and hydrochloric acid. Here, the solution is acidic as more hydrochloric acid has been added than sodium hydroxide. Therefore, the indicator has turned red.
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Testing pH

Testing pH. Universal indicator (left) being used to test the pH of a solution (centre) of sodium hydroxide and hydrochloric acid. Here, the solution is acidic as more hydrochloric acid has been added than sodium hydroxide. Therefore, the indicator has turned red.

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