Lab Quiz 1 (Chemistry)

Question 0

Ionic bond

Answer 0

Ions that have unlike charges and form a bond

Question 1

Ions

Answer 1

Atom that has lost or gained electrons

Question 2

Covalent bond

Answer 2

Electrons are shared between atoms

Question 3

Acid

Answer 3

Molecule that release hydrogen ions( hydrogen atom that is positively charged-lost an electron)

Question 4

Base

Answer 4

Remove hydrogen ions from different solutions

Question 5

pH scale

Answer 5

Measure of number of hydrogen ions present in a solution

Question 6

Neutral solutions

Answer 6

Have an equal number of hydrogen ions and hydroxide ions

Question 7

What color does bromthymol blue change when mixed with an acid

Answer 7

Yellow

Question 8

What color is bromthymol blue in a base

Answer 8

Blue

Question 9

What color would you expect bromthymol blue to be if it is in a neutral soloution

Answer 9

Yellow

Question 10

What color does phenolphthalein change to in a base

Answer 10

Hot pink

Question 11

Which is an indicator of acid

• bromthymol blue
• phenolphthalein

Answer 11

Bromthymol blue

Question 12

When does a chemical reaction happen

Answer 12

Two atoms or molecules react with one another

Question 13

Physical evidence that a reaction has taken place

Answer 13

Bubbling
Color change
Production of heat

Question 14

NaCl+AgNO3= NaNO3+ AgCl

Answer 14

Sodium chloride +silver nitrate= sodium nitrate+silver chloride

Question 15

Pb(NO3)2 + KI= PbI2+ KNO3

Answer 15

Potassium iodide + lead nitrate = lead iodide + potassium nitrate

Question 16

Acid + base equals

Answer 16

Salt + water

Question 17

What happens to sodium bicarbonate mixed with hydrochloic acid

Answer 17

Bubble

Question 18

What happens to sodium chloride mixed with silver nitrate

Answer 18

It becomes an opaque white

Question 19

What happens to potassium iodide mixed with lead nitrate

Answer 19

Becomes yellow