Your Quarter Grade Depends On It

Read the following sentence and then answer the T/F questions:

“Copper sulfate is a compound made of the elements copper, sulfur and oxygen.”

Copper is made of one kind of atom:Copper sulfate is made from three elements:Copper is a compound:Copper sulfate is a compound:

T / FT / FT / FT / F

Your Quarter Grade Depends On It

What does the following sentence mean?

“You must read this question & TRY to answer.”

The question is optional.

I can leave the answer blank if I feel like it.

Dr. V won’t notice if I leave the question blank.

I must read the question, but don’t have to give an answer.

I must read and try to answer the question.

A.

B.

C.

D.

E.

Suffering Sulfate

• Copper sulfate (compound) is blue & crystalline, copper (element) is orange-brown & metallic.

• Chromium sulfide (compound) is dull & black, chromium (element) is shiny & silver

FeFe2+Cu2+Cu

Start with: Cu2+ (aq) + Fe (s)

End with: Cu (s) + Fe (aq)

Cu2+ (aq) + Fe (s) Cu (s) + Fe2+ (aq)

What’s wrong with this picture?

• What elements were used in this lab?

Copper, sulfur, oxygen

• What compounds were used in this lab?

Copper, sulfur, oxygen

OFF

Describe differences in the properties of chromium sulfate (compound) and metallic chromium (element) ?

• “The chromium sulfate is a black, spray-paint looking color and it forms from dipping chrome in copper sulfate, while metallic chromium is a shiny metal and looks bright gray.”Thanks JW!

• “Chromium sulfate is a compound and chromium is an element.” Well … duh!

Pick the answer that’s actually an answer: