chemical properties

Question 1

what is a chemical property?

Answer 1

the ability of a substance to react and form new substance

Question 2

what is the usefulness of chemical properties?

Answer 2

• properties can be used to identify substance

- match substance to usage

Question 3

what is combustibility?

Answer 3

ability of a substance to react with oxygen

Question 4

what is reactivity with water?

Answer 4

ability of a substance to react with water

Question 5

what is toxicity?

Answer 5

ability of a substance to cause harmful effects

Question 6

what is stability?

Answer 6

ability of a substance to remain unchanged

Question 7

what is reactivity with air?

Answer 7

ability of a substance to react with air

Question 8

what is reactivity with acids?

Answer 8

ability of a substance to react with acids

Question 9

what is reactivity with another pure substance?

Answer 9

ability of a substance to react with another pure substance

Question 10

how do you observe a chemical property?

Answer 10

when one or more new substances are formed

Question 11

how do you know there are new substances formed?

Answer 11

by observing physical properties of the substances before mixing and after mixing

Question 12

one of the clues to know if there is a new substance formed is to see if the substance changes _______

Answer 12

colour

Question 13

one of the clues to know if there is a new substance formed is to see if _____ of gas are formed?

Answer 13

bubbles

Question 14

one of the clues to know if there is a new substance formed is to see if the new substance is now a ______?

Answer 14

a solid

Question 15

one of the clues to know if there is a new substance formed is to see if ____ or _____ is produced

Answer 15

heat or light

Question 16

one of the clues to know if there is a new substance formed is to see if the change is _________?

Answer 16

difficult to reverse