Solutions, Acids, & Bases

If you have a solution that is very acidic with a pH of 3.5, what can you do to raise the pH? 

• add more acid
• add more water
• increase the temperature
• add a base

When Sally tested an unknown substance, her red litmus paper turned blue but her blue litmus paper did not change color. What is the solution?

• Acid
• Base
• neutral
• world peace

Tags

NGSS.MS-PS1-2

According to the pH scale, which of the following would be true?

• baking soda is a weak base while drain cleaner is a strong base
• lemon is a weaker acid than a banana
• tomato and soap are acidic
• vinegar is less acidic than an apple

Which of the following would NOT be a way to speed up the rate of solubility of rock salt?

• stir it
• heat the water
• crush the salt
• cool the water

Tags

NGSS.HS-PS1-5

Which characteristics describe an acid?

• sour, indicator turns red, pH less than 7, produces hydrogen ions (H⁺)
• bitter, slippery, indicator turns blue, pH greater than 7, produces hydroxide ions (OH^-)
• neutral, pH of 7
• sour, indicator turns red, pH greater than 7

Which characteristics describe a base?

• sour, indicator turns red, pH less than 7, produces hydrogen ions (H⁺)
• bitter, slippery, indicator turns blue, pH greater than 7, produces hydroxide ions (OH^-)
• neutral, pH of 7
• sour, indicator turns red, pH greater than 7

An extremely strong base would have a pH of...

• 1
• 7
• 9
• 14

An extremely strong acid would have a pH of...

• 1
• 7
• 9
• 14

A neutral substance would have pH of...

• 8
• 7
• 6
• 14

The _____is the part that gets dissolved. 

• solute 
• solvent 
• solution 
• Sacajawea