Chemistry Flashcards
(26 cards)
Finish this equation
Acid + alkali ( arrow) ……. + water
Salt
What is the name of the process on an acid and an alkali react
Neutralisation
Is a substance with a pH below 7 and acid or an alkali?
Acid
Water has a pH of seven. This means the water is…… What?
Neutral
A solution was found to have a pH of three. Is the solution alkaline or acidic?.
Acidic
As a substance with a pH above 7 an acid or an alkali?
An alkali
What colour does litmus paper change to when it is dipped in an acid?
Red
What pH value would you expect stomach acid to have?
3
stomach acid has a low PH
Which is more acidic, pH2 or pH4?
Ph2
The pH scale is a measurement of how. …… a solution is. What one word completes this sentence
Acidic or alkaline or basic
What is the range on the pH scale?
0 to 14
What colour would you expect lemon juice to turn universal indicator??
Orange
What colour does sulphuric acid turn blue litmus paper??
Red
Word equation
Metal + acid arrow salt + hydrogen
Which salt would form if you reacted hydrochloric acid with calcium hydroxide?
Calcium chloride
Is lemon juice acidic?
Yes
What is the acid in your stomach called?
Hydrochloric acid. It helps with digestion
Can acids be neutralised?
Yes
What are the substances that can neutralise acids
Bases
What happens when acids react with bases
They form salts and water. This is called a neutralisation reaction
Ammonia dissolves in water to give a solution. Well this solution be acidic or alkaline?
Alkaline
