Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride

Balance the chemical equation by including the physical states of the substances for the following reactions.a) Barium chloride and sodium sulphate aqueous solutions react to give insoluble Barium sulphate and an aqueous solution of sodium chloride.b) Sodium hydroxide reacts with hydrochloric acid to produce sodium chloride and water.c) Zinc pieces react with dilute hydrochloric acid to liberate hydrogen gas and forms zinc chloride

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\( \newcommand \] Example \(\PageIndex\) The occurrence or nonoccurrence of precipitates can be used to detect the presence or absence of various species in solution. BaCl 2 solution, for instance, is often used as a test for SO 4 2–( aq) ion. There are several insoluble salts of Ba, but they all dissolve in dilute acid except for BaSO 4. Thus, if BaCl 2 solution is added to an unknown solution which has previously been acidified, the occurrence of a white precipitate is proof of the presence of the SO 4 2– ion. AgNO 3 solution is often used in a similar way to test for halide ion. If AgNO 3 solution is added to an acidified unknown solution, a white precipitate indicates the presence of Cl – ions, a cream-colored precipitate indicates the presence of Br – ions, and a yellow precipitate indicates the presence of I – ions. Further tests can then be made to see whether perhaps a mixture of these ions is present. When AgNO 3 is added to tap water, a white precipitate is almost always formed. The Cl – ions in tap water usually come from the Cl 2 which is added to municipal water supplies to kill microorganisms. Precipitates are also used for quantitative analysis of solutions, that is, to determine the amount of solute or the mass of solute in a given solution. For this purpose it is often convenient to use the first of the three types of equations described above. Then the rules of stoichiometry may be applied. Example \(\PageIndex\): Solubility. Rules Soluble in Water Import...

Balanced chemical equation: • A balanced chemical equation is an equation in which the number of atoms in the reactant and the product's side should be an equal number. • It obeys the law of conservation of mass and momentum. Reaction: • When sodium hydroxide a base in water reacts with an acid of hydrochloric acd gives sodium chloride and water, the reaction for this is NaOH ( aq ) + HCl ( aq ) → NaCl ( aq ) + H 2 O ( l ) • This is the balanced equation where the number of atoms on the reactant and product side is an equal number Element Reactant Product Na 1 1 O 1 1 H 2 2 Cl 1 1 • When sodium hydroxide and hydrochloric acid combine, sodium chloride salt and water are formed. • It's a neutralisation reaction when an acid combines with a base to produce salt and water. Q. (a) Substitute formulae for names and balance the following equation: Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas. (b) Write balanced chemical equation with state symbols for the following reaction: Sodium hydroxide solution reacts with hydrochloric acid solution to produce sodium chloride solution and water. Q. write a balanced chemical equation with state symbol for the following reaction? (1) solution of barium chloride and sodium sulphate in water react with this solution in water to give insoluble barium sulphate and the solution of barium. (2) sodium hydroxide solution in water reacts with hydrochloric solution in water to produce sodiu...

Question 1. Why should magnesium ribbon be cleaned before burning air ? Answer: A layer of magnesium oxide is already present on the surface of magnesium ribbon which does not allow burning of magnesium ribbon in air. So magnesium ribbon should be cleaned before burning in air. Question 2. Write the balanced equation for the following chemical reactions: (i) Hydrogen + Chlorine → Hydrogen chloride (ii) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride (iii) Sodium + Water → Sodium hydroxide + Hydrogen Answer: (i) H 2(g) + Cl 2(g) → 2HCl (g) (ii) 3 BaCl 2 + Al 2(SO 4) 3 → 3 BaSO 4 + 2AlCl 3 (iii) Na (s) + H 2O (l) → NaOH (aq) + H 2(g) Question 3. Write a balanced chemical equation with state symbols for the following reactions : (i) Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride. (ii) Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride and water. Answer: (i) BaCl 2 (aq) + Na 2SO 4 (aq) → BaSO 4 (↓) + 2NaCl (aq) (ii) NaOH (aq) + HCl (aq) → NaCl (aq) + H 2O (l) In-text Questions (Page 10) Question 1. A solution of a substance ‘X is used for white-washing: (i) Name the substance ‘X’ and write its formula. (ii) Write the reaction of the substance ‘X’ named in (i) above with water. Answer: (i) The substance ‘X’ is quick lime or calcium oxide. Question 2. Why is the amount of gas collected in one of the test...