Topic 3 - Energy Changes

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Total cards: 24•Content version: v3•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

What are acids in solution a source of?

Back (Answer)

hydrogen ions

Front (Question)

What are alkalis in solution a source of?

Back (Answer)

hydroxide

Front (Question)

What is the pH of a neutral solution?

Back (Answer)

Front (Question)

Do acidic solutions have high or low pH values?

Back (Answer)

low (less than 7)

Front (Question)

Do alkaline solutions have high or low pH values?

Back (Answer)

high (greater than 7)

Front (Question)

Give the colour of methyl orange indicator when it is put into an acidic solution

Back (Answer)

red

Front (Question)

Give the colour of methyl orange indicator when it is put into an neutral solution

Back (Answer)

yellow

Front (Question)

Give the colour of methyl orange indicator when it is put into an alkaline solution

Back (Answer)

yellow

Front (Question)

Give the colour of phenolphthalein indicator when it is put into an acidic solution

Back (Answer)

colourless

#10

Front (Question)

Give the colour of phenolphthalein indicator when it is put into an neutral solution

Back (Answer)

colourless

#11

Front (Question)

Give the colour of phenolphthalein indicator when it is put into an alkaline solution

Back (Answer)

pink

#12

Front (Question)

What happens to pH when hydrogen ion concentration increases?

Back (Answer)

it decreases

#13

Front (Question)

What happens to pH when hydrogen ion concentration decreases?

Back (Answer)

it increases

#14

Front (Question)

What happens to pH as hydrogen ion concentration in a solution increases by a factor of 10?

Back (Answer)

it decreases by 1

#15

Front (Question)

What is the difference between a concentrated and dilute solution?

Back (Answer)

a concentrated solution has a higher amount of substance dissolved in the solution

#16

Front (Question)

What is a weak acid?

Back (Answer)

one that only partially dissociates into ions

#17

Front (Question)

What is a strong acid?

Back (Answer)

one that fully dissociates into ions

#18

Front (Question)

What is a base?

Back (Answer)

any substance that reacts with an acid to form a salt and water only

#19

Front (Question)

What are alkalis?

Back (Answer)

soluble bases

#20

Front (Question)

Complete this equation: acid + metal –>

Back (Answer)

salt + hydrogen

#21

Front (Question)

Complete this equation: acid + metal oxide –>

Back (Answer)

salt + water

#22

Front (Question)

Complete this equation: acid + metal hydroxide –>

Back (Answer)

salt + water

#23

Front (Question)

Complete this equation: acid + metal carbonate –>

Back (Answer)

salt + carbon dioxide + water

#24

Front (Question)

What is the test for hydrogen?

Back (Answer)

a lit splint causes a ‘pop’