1.

Find the pH value of the following substances using the pH paper and complete the table given below.  Name of Substance colour of pH paper pH value acid/ base Vinegar ............ .......... .......... Lime water .......... ......... ........ dil. Hydrochloric acid no colour change 7 ....... Water ......... Neutral Washing soda Solution ......... ......... ......... Ammonia Solution .......... ........ ....... Potassium nitrate solution ........... .......... ........ Sodium chloride solution no colour change ......... Neutral

Answer»
  Name of Substance colour of pH paper pH value acid/ base
 Vinegar Red less than 7 Acid
 Lime water Blue more than 7 base
 dil. Hydrochloric acid Red less than 7 Acid
 Water no colour change 7 Neutral
 Washing soda Solution Blue more than 7 base
 Ammonia Solution Blue more than 7 base
 Potassium nitrate solution no colour change 7 Neutral
 Sodium chloride solution no colour change 7 Neutral


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