Making an insoluble salt

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Presentation transcript:

Making an insoluble salt Zinc Sulfate

Using the image on the next slide, can you complete the table below? Hazard Risk Control

Making zinc sulfate

Solubility of salts – the rules Soluble Salts Insoluble Salts All nitrates Most sulfates Most chlorides, bromides and iodides Sodium carbonate, potassium carbonate Sodium hydroxide, potassium hydroxide None Lead sulfate, barium sulfate Silver chloride, silver bromide, silver iodide, lead chloride, lead bromide, lead iodide Most other carbonates Most other hydroxides

Mass of zinc oxide (g) Mass of zinc Sulfate (g) % yield

Calculating % yield Step 1 – theoretical yield Mass of zinc oxide x 161 81 Step 2 - % yield Actual mass x 100 = Theoretical mass

Why may % yield not be 100%? Discuss

In practice, it is not always possible to get the calculated amount of product in a reaction: reversible reactions may not go to completion some product may be lost when it is removed from the reaction mixture some of the reactants may react in an unexpected way

Plenary Name the following salts NaCl MgSO4 KNO3 CaCl2

What are the name of the salts formed Sodium + Sulphuric acid Magnesium carbonate + Nitric acid Potassium oxide + Hydrochloric acid