Question

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Answer 1

Answer:

1. Magnesium ribbon should be cleaned with sandpaper before burning in the air. ... To remove the Magnesium oxide layer from the ribbon which may prevent or slow down the burning of magnesium ribbon. Unwanted impurities deposited on the magnesium ribbon can be removed and only pure magnesium can be used for the reaction.

2. a) Hydrogen chloride may be formed by the direct combination of chlorine (Cl2) gas and hydrogen (H2) gas; the reaction is rapid at temperatures above 250 °C (482 °F). The reaction, represented by the equation H2 + Cl2 → 2HCl, is accompanied by evolution of heat and appears to be accelerated by moisture.

b) BaCl2+Al2(SO4)3=BaSO4+AlCl3 Balanced Equation||Barium chloride+Aluminium sulphate Balanced Equation.

c) Sodium metal reacts rapidly with water to form a colourless solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.

3. a)When an aqueous solution of sodium sulphate reacts with an aqueous solution of barium chloride, insoluble barium sulphate along with solution of sodium chloride is formed. If the reactants are in solid state, then reaction will not take place between sodium sulphate and barium chloride.

b)An acid and base always react to form a salt and water, and it is called neutralization. The salt formed in this reaction is sodium chloride, NaCl. The equation for the reaction is : NaOH + HCl = NaCl + H2O.

Explanation:

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