making salts Flashcards
What is the acid used in the preparation of copper sulfate?
Sulfuric acid
What is the base used in this experiment to neutralize sulfuric acid?
Copper oxide
What salt is formed when sulfuric acid reacts with copper oxide?
Copper sulfate
What safety equipment is mentioned as necessary when handling sulfuric acid?
Goggles
What is the purpose of gently heating the sulfuric acid before adding copper oxide?
To make the reaction go a little bit faster
Fill in the blank: A base is any material that will ______ an acid and form a salt.
Neutralize
True or False: Only alkalis can neutralize acids.
False
What indicates that the reaction between sulfuric acid and copper oxide has occurred?
The liquid turns blue
What must be done to ensure all the sulfuric acid is neutralized?
Add an excess of copper oxide
What is the purpose of filtering in this experiment?
To remove unreacted copper oxide from the copper sulfate solution
What color is the copper sulfate solution after filtering?
Bright blue
What method is used to evaporate the water from the copper sulfate solution?
Gentle heating over a beaker of boiling water
What happens to copper sulfate crystals if they are heated too much?
They begin to break down and release harmful gases
How long is the copper sulfate solution heated over the steam bath?
About ten minutes
What is the final step in obtaining pure dry copper sulfate crystals?
Scraping the crystals out of the evaporating dish onto a piece of paper
