The diagram below shows the PH values of several substances. (A) Based on PH value for substances K and M, what are the changes observed when we are testing the substances by using the blue litmus paper?

K : Blue -> ?
M : Blue -> ?

(B) Give example of substances/solutions for :
L =
M =

Changes in colour of litmus paper.

Noe

PH values:-

K is acidic as pH is <7

Hence K will change the colour of blue litmus paper.

#B

Examples of substances

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.

idk what is it? is this a question that you know the answer or u dont