Share 7th Grade Science Unit 5.5-5.6
Save to Folder
How does an indicator show whether a substance is an acid or an alkali?
It changes color depending on the substance.
What is the color change when red cabbage juice is added to lemon juice?
Red.
What does litmus do when it is added to sodium hydroxide?
It turns blue.
What color does litmus change to in an acid?
Red.
Is water an acid, an alkali, or neutral? Give the reason for your answer.
Neutral, because it turns litmus purple.
What does the pH scale measure?
The strength of acids and alkalis.
What is the pH of a neutral solution?
7.
A liquid has a pH of 1. What type of liquid is it?
Strong acid.
What range of pH do strong alkalis have?
12-14.
What color does universal indicator turn in a liquid with a pH of 9?
Blue.
Which colors does universal indicator turn in acids?
Red and yellow.
Name a food that contains acid.
Lemon.
Describe the taste of lemons and limes.
Sour and tangy.
What does corrosive mean?
A substance that can burn and damage skin or materials.
What should you do if you spill acid?
Wash the area with plenty of water.
What common household products contain alkalis?
Cleaning products.
