If a weak acid is titrated with a strong base the solution is slightly basic because the salt formed will be hydrolysed to a certain extent. The reaction is marked to an end by the formation of this product. THE REACTION: when Sodium Thiosulphate reacts with hydrochloric acid sulphur is produced. A titration is a technique, in which a reagent, called a titrant, of known concentration is used to … Sodium Thiosulphate + Hydrochloric acid »» Sulphur + Sodium Chloride + Sulphur Dioxide + Water Your product for the sulfur is H2S not SH. Stage 1 Using a small funnel, pour a few cubic centimetres of 0.4 M hydrochloric acid into the burette, with the tap open and a beaker under the open tap. Yes Sodium is a metal thus the general equation is Metal + acid → Salt + Hydrogen Na + HCL → NaCl + H2 Although it’s not recommended to try this reaction because sodium is a very reactive metal which reacts vigorously with acids. Similarly, note the initial temperature of the sodium hydroxide solution taken in a separate vessel. Hydrochloric acid. The sulphur forms in very small particles and causes the solution to cloud over and turn a yellow colour. Both the solutions should have the same temperature, otherwise wait for some time so that they attain the same temperature. The sodium ignites, producing a bright flame. It may also be thought of as the sodium salt of hypochlorous acid. The reaction between sodium and hydrochloric acid is also violent and over quickly though less so than the reaction between potassium and hydrochloric acid. When weak base is titrated with a strong acid solution is slightly acidic at end point. Hydrochloric acid solution may be titrated against sodium carbonate solution using methyl orange indicator. 02 Thursday, December 19, 2013 Introduction The following lab was an acid-base neutralizing titration. Hydrochloric acid is colorless, sodium thiosulphate is a white crystal The two will react to form a sodium chloride salt, sulfur, water, and sulfur dioxide gas .sulphur is a solid with an intense yellow color. Hydrochloric Acid and Sodium Sulphate. Sodium hypochlorite is a chemical compound with the formula NaClO and it is composed of a sodium cation (Na+) and a hypochlorite anion (ClO−). Place 100 ml of 1.0 M hydrochloric acid solution in it. It is a by-product of the Leblanc soda process, and in the early years of the industry was allowed to escape into the air, as the demand for it was small. INOVYN produces hydrochloric acid in a variety of grades tailored to industry needs. Your clue is Na2S: since both H and Na form +1 ions their sulfides should have similar formulas. Titration of Hydrochloric acid with Sodium Hydroxide . Na2S + 2 HCl ---> H2S + 2 NaCl Hydrochloric or muriatic acid is generally made by the action of sulphuric acid on common salt. 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