Question

(A) How is ph paper used to find the ph of a solution
(B) the ph value of water is 7 what will be the ph value of (I) aqueous solution of sodium hydroxide and (ii)dil.HCL

Answer 1

A) pH paper when dipped in solution of a sample changes its colour nd the pH value can be determined by matching it with the scale.

B) i) purple

ii) red

Answer 2

HEY MATE HERE IS YOUR ANS :)


A] PH PAPER IS ALSO KNOW ANS LITMUS PAPER.
LITMUS IS OBTAINED FROM LICHENS .
AN ACID TURNS BLUE LITMUS PAPER RED
AND BASE TURNS RED LITMUS BLUE.

B] ( I ) ITS PH WILL INCREASE BECASUE OF MIXING OF SODIUM HYDROXIDE BECAUSE SODIUM HYDROXIDE IS A BASE.
(2) IT BECOME ACIDIC AND PH WILL DECREASE BECAUSE HCL IS A ACID.




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