Question

a student was even the solution to find this phs teacher declared is recorded phs wrong student explain to his teacher all this there by him while finding pH of sample mark the step taken by student in which he committed mistake a collection of Apparatus be the recording of of observation see making pH people wet and then dipped in sample De cleaning of all apparatus​

Answer 1

From the samples what student has collected to test the pH value , washing soda is wrong selection. Because pH paper acts as indicators when substances are aqueous solution.

4.3