1st Quarter Exam

Ava is testing the pH of four different fruit juices. She records the pH values as 1, 3, 5, and 6. Which of the following pH values would indicate the weakest acid?

• 1

• 3

• 5

• 6

Kai is testing the pH of different fruit juices. He finds that one juice has a pH of 1, another has a pH of 3, another has a pH of 4, and the last one has a pH of 6. Which of these juices is the strongest acid?

• 1

• 3

• 4

• 6

Aria is helping her younger sibling with a chemistry experiment. She has four bottles, each labeled with a chemical formula: HBr, HF, HCl, and LiOH. She wants to know which one is NOT an acid before proceeding. Which of the following chemical formulas is NOT an acid?

• HBr

• HF

• HCl

• LiOH

Hannah is cleaning her kitchen and accidentally spills a cleaning solution on her hand. She notices the following characteristics:

Very bitter taste (she accidentally tastes a drop)

Feels slippery to the touch

Produces OH- ions when dissolved in water (as stated on the label)

In what category would the cleaning solution be classified?

• acid

• base

• enzyme

• fatty acid

Tags

NGSS.MS-PS1-1

William is cleaning his kitchen and uses a solution of KOH to remove grease. Based on its properties, KOH is ...

• an acid

• a base

• a salt

• an ionic compound

Jackson is testing the pH of water from a local stream and discovers that it is a basic solution. Of the following choices, what could the pH have been?

• 3

• 9

• 7

• 5

Liam is testing the pH of different household solutions. He finds one with a pH of 8, another with a pH of 14, one with a pH of 7, and another with a pH of 11. Which of these would be considered the weakest base? 

• 8

• 14

• 7

• 11

Ethan is testing the pH of different liquids in his kitchen. He finds that pure water has a pH of 7. Pure water _______.

• is a base

• is a neutral substance

• could be either an acid or a base

• is an acid

Maya is conducting an experiment in her science class and comes across a solution with a label that says "pH 7". She wonders what pH stands for. What does pH stand for?

• Percent of hydrogen

• Power of Hydrogen

• Phenolphthalein

• Phosphorus:Hydrogen ratio

Mason is conducting an experiment in his kitchen to learn about acids. He notices that lemon juice tastes sour, conducts electricity when mixed with water, and reacts with a piece of metal to produce bubbles of gas. Based on these observations, which of the following are properties of acids?

• They conduct electricity when dissolved in water

• They taste sour

• They react with metals to produce hydrogen gas

• All of the answer choices are correct

Tags

NGSS.MS-PS1-2