Carry out a reaction between solutions of the following substances: a) sodium hydroxide and copper sulfate (2)

| May 23, 2021 | education

Carry out a reaction between solutions of the following substances: a) sodium hydroxide and copper sulfate (2) b) sodium carbonate and hydrochloric acid c) sodium hydroxide (in the presence of phenolphthalein) and sulfuric acid.

Task number 1
Sodium hydroxide and copper sulfate, blue copper hydroxide precipitates: 2NaOH + CuSO4 = Na2SO4 + Cu (OH) 2

Task number 2
Sodium carbonate and hydrochloric acid, foaming due to the release of carbon dioxide: Na2CO3 + 2HCl = 2NaCl + CO2 + H2O

Task number 3
Sodium hydroxide in the presence of phenolphthalein and sulfuric acid. At the moment when there is only sodium hydroxide in the solution, phenolphthalein stains the solution in a crimson color. At the moment of supply of sulfuric acid, the alkali enters into neutralization with the acid and the solution becomes uncolored .: 2NaOH + H2SO4 = Na2SO4 + 2H2O



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