- Reagents, tripod tubes
Someone may think that the easiest way to obtain chloride copper (II) is the reaction of metalhydrochloric acid.However, in practice this is not so, because there is a rule according to which a dilute acids react only metals standing in the electrochemical electrochemical series of metals to hydrogen.Copper in this case is, after hydrogen, and therefore the reaction is not.
Copper + CI = copper chloride (II).The interaction of metal copper chlorine produced only one substance - copper chloride (II), therefore, is the reaction of a compound.To experience the red-hot copper wire in the flame of the burner and fill the vessel with chlo
rine, which has at the bottom of a small amount of water.There is a violent reaction of the salt, which dissolves in water.
Copper + = soluble salt of another metal + other salt.This reaction is not far from each soluble salt.Be sure to focus on the electrochemical voltage series of metals.Just go with the salt reaction, which include metal, standing in a row after copper .These metals include mercury, silver and others.That is, in this case complied with the rule - in the electrochemical series of metal replaces the previous one from the salt after.
copper oxide + = chloride, hydrochloric acid copper (II) + water.To take a test tube of salt, pour into it one-third of hydrochloric acid, place the copper oxide (II) (black powder) and heat to the flame of a spirit lamp.In the reaction, a solution of green (in the case of concentrated salt) or blue-green.
copper hydroxide (II) + hydrochloric acid chloride = copper (II) + water.Otherwise, a chemical reaction called neutralization reaction.Copper hydroxide (II) is a precipitate of blue color.For a freshly prepared substance (copper hydroxide (II)) tide a little hydrochloric acid, and the precipitate was dissolved to form a solution of copper chloride (II) blue-blue.
copper carbonate (II) + hydrochloric acid chloride = copper (II) + carbon dioxide + water.Take copper carbonate , which is a white crystalline substance with a greenish tinge, and make a small amount in a test tube with hydrochloric acid.There will be a boiling due to carbon dioxide emissions, and the solution acquires a blue-blue color due to the formation of copper chloride (II).
When performing experiments required to follow safety regulations.
Note the electrochemical voltage series of metals.