Acids, Bases and Salts

(a) Dilute sulphuric acid reacts with zinc granules to give zinc sulphate and hydrogen gas Dilute sulphuric acid + zinc → Zinc Sulphate + Hydrogen Gas H2SO4(aq) + Zn → ZnSO4(aq) + H2(g) (b) Dilute hydrochloric acid reacts with magnesium ribbon to give magnesium oxide and hydrogen gas. Dilute Hydrochloric + Magnesium → Magnesium Chloride …

Write word equations and then balanced equations for the reaction taking place when
(a) Dilute sulphuric acid reacts with zinc granules.
(b) Dilute hydrochloric acid reacts with magnesium ribbon.
(c) Dilute sulphuric acid reacts with aluminium powder.
(d) Dilute hydrochloric acid reacts with iron filings. Read More »

The correct answer is (c) Antacid Indigestion is due to the excess production of acid (HCl) in the stomach. Medicines used to treat indigestion is called Antacid.

The answer is option (d) 16ml. 10 ml of NaOH requires 8 ml of HCl, and 20 ml of NaOH requires 8 x 2 = 16 ml of HCl.

The answer is (b) HCl. Eggshells are made by calcium carbonate (CaCO3), which in reaction with HCl, liberates CO2 gas, which turns lime water[Ca(OH)2] into milky due to formation of milky colour of calcium carbonate(CaCO3). CaCO3(s)​ + 2HCl(aq)​ → CaCl2(aq) ​+ H2​O(l) ​+ CO2(g)​ Ca(OH)2(aq) + CO2(aq) → CaCO3(s) + H2O(l)

The answer is 10 because red litmus paper turns to blue. when the solution reacts with a basic solution ( PH > 7). Hence, the answer is (d) 10.

The chemical equation for the reaction of Plaster of Paris and water is CaSO4.1/2H2O + 3/2H2O → CaSO4.2H2O

Heating sodium hydrocarbonate (NaHCO3 ) yields sodium carbonate(Na2CO3 ), and carbon dioxide (CO2 ) gas is liberated in the process. 2NaHCO3(s) + Heat → Na2CO3(s)+H2O(l)+CO2(↑)

Sodium carbonate(Na2CO3) is the compound, which is used for softening hard water.

A substance, on treatment with chlorine(Cl2), yields bleaching powder is Calcium hydroxide (CaOH)2. Ca(OH)2 + Cl2→CaOCl2 + H2O.

The common name of CaOCl2 is bleaching powder.