What colour will universal indicator show if you add it to the following substances?

(a) potassium hydroxide, pH = 12

(b) sodawater, pH = 5

(c) sulphuric acid, pH = 2

10 The pH of soil A is 7.5 while that of soil B is 4.5. Which of the two soils, A or B, should be treated with powdered chalk to adjust its pH and why? 11 What is the name of the indicator which can be used for testing the pH of a solution? 13 A beaker of concentrated hydrochloric acid has a pH of 1. What colour will full range universal indicator tum if it is added to this beaker? Is it a strong or a weak acid? 14 Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?