Copper lab

Question 1

What was the formula of the brown gas?

Answer 1

NO2

Question 2

What was the color of the copper(II) nitrate solution?

Answer 2

Bright blue and translucent

Question 3

Was the copper (II) nitrate solution soluble or insoluble?

Answer 3

Soluble

Question 4

What was the color and appearance of the copper (II) hydroxide?

Answer 4

Opaque cyan blue

Question 5

Was the copper (II) hydroxide soluble or insoluble?

Answer 5

Insoluble

Question 6

What was the color of the copper (II) oxide?

Answer 6

Opaque black

Question 7

Was the copper (II) oxide soluble or insoluble?

Answer 7

Insoluble

Question 8

What was the color of copper (II) sulfate?

Answer 8

Translucent bright blue

Question 9

Was the copper (II) sulfate soluble or insoluble?

Answer 9

Soluble

Question 10

What was the color of the zinc metal before the reaction?

Answer 10

Gray

Question 11

What was the color of the copper metal after the reaction?

Answer 11

Reddish orange

Question 12

What was the color of the solution before the zinc reaction?

Answer 12

Translucent bright blue

Question 13

What was the color of the solution after the zinc reaction?

Answer 13

Clear

Question 14

What was the color of the hydrogen gas?

Answer 14

Clear

Question 15

What was the formula for reaction 1?

Answer 15

Cu+4HNO3 –> Cu(NO3)2 + 2NO2 + 2H2O

Question 16

What was the formula for reaction 2?

Answer 16

Cu(NO3)2 + 2NaOH –> Cu(OH)2 + 2NaNO3

Question 17

What was the formula for reaction 3?

Answer 17

Cu(OH)2 –> CuO + H2O

Question 18

What was the formula for reaction 4?

Answer 18

CuO + H2SO4 –> CuSO4 + H2O

Question 19

What was the first formula for reaction 5?

Answer 19

CuSO4 + Zn –> Cu + ZnSO4

Question 20

What was the second formula for reaction 5?

Answer 20

Zn + H2SO4 –> ZnSO4 + H2