Acid & Bases II

Which of the following statements are true about acids?

I Acid solutions have pH values less than 7.

II Acids can react with metals to produce hydrogen gas.

III Acids can react with all bases to produce carbon dioxide gas.

IV Acids will change blue litmus paper into red.

• I, II and III

• I, II and IV

• I, III and IV

• II, III and IV

Which of the following are true about bases?

I Bases are oxides and hydroxides of metals.

II Most of the bases are not soluble in water.

III Reaction of bases and water is known as neutralisation.

IV Bases that are soluble in water are known as alkalis.

• I, II and III

• I, II and IV

• I, III and IV

• II, III and IV

Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.

The substance in the beaker

• is a base.

• has a neutral pH.

• is an acid.

• does not have a pH.

Many cleaning solutions are bases. Which of the following is a property of most bases?

• feels slippery

• white color

• can only be liquid

• tastes sour

You know you a chemical reaction has occurred if

• there is a precipitate.

• there is a color change.

• there is a temperature change.

• All of these answers are evidence.

The pH value of an acid represents its __________ of positive ions in the solution

• amount

• concentration

• color

• charge

Tags

NGSS.HS-PS1-5

Solutions that have more OH– ions than H+ ions are

• acids

• bases

• enzymes

• neutral

What is the pH of a solution if [H⁺] = 6.0 x 10^-10 M?

• 3.45
• 6.25
• 9.22
• 11.34

Predict the products for the following reaction:
LiOH + H₂SO₄ -->

• LiSO₄ + HOH
• LiSO₄ + H₂(OH)
• Li₂SO₄ + HOH
• Li₂SO₄ + H₂(OH)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A sample of sulfuric acid is titrated with 0.24 M sodium hydroxide. The titration curve appears below. How much NaOH is needed to reach the equivalence point?

• 11 mL NaOH
• 20 mL NaOH
• 22 mL NaOH
• 40 mL NaOH

Tags

NGSS.HS-PS1-7