Acids and Bases Quiz

So what is the definition of a base?

• Bases accept protons

• Bases are proton donors

• Bases increase the number of protons in an aqueous solution

• Bases donate protons to water molecules

Egg white has a proton concentration of approximately 0.00000001 M (10-8). or 1 times 10 to the power of negative 8 moles per liter How would you categorize egg white?

• Slightly basic

• Neutral

• Slightly acidic

• Strongly acidic

What was transferred from the hydrochloric acid to the water molecule? Click on the background to slide down the LabPad and have a look again.

• An electron

• A hydrogen atom

• H+ a proton

• A water molecule

How are the pOH and pH linked? Lower your LabPad to take a look at the graph and figure out the numbers.

• pH + pOH = 14

• pH = 7 + pOH

• 7 * pH = 14 - pOH 7 times pH equals 14 minus pOH

• 7 + pOH = pH - 7PH Minus 7

Guess how many water molecules self-ionize in one liter of water!

• 2 moles

• 0.0000001 moles or one to the power of minus seven

• 10,000,000 moles

• 1 mole

Remember the Bronsted-Lowry definition of acids and bases? What is water according to this definition?

• An acid and a base

• An acid

• A base

• Neither acid nor base

Based on what you have seen, which is the best definition for an acid?

• Acids split into two molecules in aqueous solution

• Acids accept protons from water molecules

• Acids remove a proton from each water molecule

• Acids donate protons in aqueous solution

Which unit is used to express the acidity of an acid or alkaline solution?

• pH

• Moles

• Voltage

• Karat

What results from a reaction of a base (NaOH) Sodium hydroxide and a hydronium ion (H3O+)H three O plus?

• 2 H2O and Na+

• 2 water molecules and sodium cation

• Water and a strong base

• Water and a strong acid

What makes an acid acidic?

• Chemical structure

• Temperature

• Phase

• Number of protons in a molecule