Last seen: Sep 10, 2021
Solution A (pH = 3.0) will turn litmus from solution blue to red Solution B (pH = 9.5) will turn phenolphthalein from colourless to pink.
Solution Y is a stronger acid.
pH = 1 will turn the scale red; strong acid.
(a) Dark Purple (b) Orange Yellow (c) Red
Universal indicator
Soil B. Soil B is acidic in nature so its treated with powdered chalk to reduce its acidity.
Universal indicator
Solution of pH = 11
Solution of pH = 2 is more acidic.
7 pH of a neutral solution.
Tooth decay start when the pH of mouth is lower than 5.5 because the acid becomes strong enough to attack the enamel of the teeth and corrode it.
They all produce hydroxide ions when dissolved in water.
(a) Hydrogen (b) Hydrogen
(a) H+ ions of acid combine with OH– ions of alkali to form water, H2O. (b) Temperature of the solution rises.
Neutralisation of a carbonate with an acid produces carbon dioxide gas but not with an oxide or hydroxide.
Substance X is sodium hydrogen carbonate; Gas Y is carbon dioxide. NaHCO3(s) + HCl(aq) → CO2(g) + NaCl(aq) + H2O(l)
Acidic solution will turn blue litmus red; This red litmus will turn blue in basic solution; Distilled water will have no effect on any type of litmus...