Chemical Reactions Lab

Question 1

When Zinc was placed in HCL it started to dissolve bubbly. Why is that?

Answer 1

When an acid reacts with a metal, it displaces the hydrogen to separate the hydrogen gas the ZnCl2

Question 2

When manganese oxide is placed in hydrogen peroxide, it turned a dark color. Why is that?

Answer 2

When the oxygen was released, it formed a brown-ish precipitate that is specific to its metal ion

Question 3

When 3cm of a magnesium ribbon was burned, it lit up brightly. Why is that?

Answer 3

The magnesium ribbon produced a reaction when lit, that emitted a sufficient intensity of heat and light

Question 4

When 1 ml of calcium chloride was mixed with sodium carbonate, there was NO reaction. Why?

Answer 4

All resulting compounds remained soluble in the water, causing there to be no visible reaction.

Question 5

Why did the 5 ml of ethanol expand when lit on fire?

Answer 5

Because the alcohol expanded more rapidly than the glass it is contained in. - thermal expansion

Question 6

Single Replacement

Answer 6

A reaction in which one element replaces another in a compound

Question 7

Double Replacement

Answer 7

Two ionic compounds that are exchanging anions and cations

Question 8

Synthesis

Answer 8

Simple elements or compounds that combine for a more complex product

Question 9

Decombustion

Answer 9

When a reaction breaks down into simpler substances

Question 10

Combustion

Answer 10

A chemical reaction between any combustible substance to form an oxidized product - occurring in hydrocarbon (molecules with hydrogen and carbon components)