Question

Reaction A

When an aluminum wire is placed in a solution of copper II chloride the following reaction occurs:

CuCl2 + Al --> Cu + AlCl3

What is the reddish solid product you observed?

Group of answer choices

Copper

Aluminum

Aluminum chloride

Rust

Flag question: Question 7
Question 710 pts
Of the four reactions you observed, which was already balanced?
Group of answer choices

CuCO3 --> CO2 + CuO

Mg + O2 --> MgO

CuCl2 + Al --> Cu + AlCl3

HCl + Zn --> H2 + ZnCl2

Flag question: Question 8
Question 810 pts
If a flame test were performed on a test tube where oxygen gas was produced
Group of answer choices

a popping noise would occur

the flame would extinguish

there is no positive flame test for oxygen gas

bubbles would form

the gas would ignite (catch on fire)

Flag question: Question 9
Question 910 pts
Which of the following was NOT observed in the decomposition reaction of copper II carbonate when you heated the powder in the test tube over the flame? (Reaction B)
Group of answer choices

started with a turquoise solid

a gas was produced that extinguished a flame

a black solid was formed

an odorous, yellow gas was produced

Flag question: Question 10
Question 1010 pts
Which type of reaction has only one reactant? (One starting substance)
Group of answer choices

Double Replacement

Single Replacement

Combustion

Decomposition

Synthesis

Answer 1

Reaction A: Copper

Q7 (already balanced): CuCO3 --> CO2 + CuO

Q8 (flame test for O2): the gas would ignite (catch on fire) — oxygen supports relighting a glowing splint

Q9 (NOT observed in CuCO3 decomposition): an odorous, yellow gas was produced

Q10 (one reactant): Decomposition