Assessment of high grade student difficulties in learning about

Acids make litmus paper turn

• Red

• Blue

• Black

• Yellow

Bases feel

• rough

• slippery

•  moist

•  dry

Bases react with

• acids to produce salts and water

• water to produce acids and salts

• salts to produce acids and water

• neither acids, salts, nor water

Which type of solution is one with a pH of 7

• acidic

• basic

•  neutral                                        

• non

Which are the correct products for these reactants HCl + NaOH

• HOH + ClNa                                                      

• NaCl + H2O

• H3O + NaCl2

• NaOH + Cl

Which of the following chemical reactions represents an acid-base reaction?

• HBr + KOH àKBr + H2O

• ZnCl2 + MgSO4 àZnSO4 + MgCl2

• H2SO4 + CaCl2 à CaSO4 + HCl

• NH4OH + KCl àKOH + NH4Cl

Strong acids are

• strong electrolytes.

• nonelectrolytes.

• weak electrolytes.

• also strong acids.

Which statement about Arrhenius acids is FALSE?

• Their water solutions are called aqueous acids.

• They are molecular compounds with ionizable hydrogen atoms.

• Their pure aqueous solutions are electrolytes.

• They increase the concentration of hydroxide ions in aqueous solution.

Whose definition of acids and bases emphasizes the role of protons?

• Brønsted  and Lowry

• Lewis

• Arrhenius

• Faraday

What is the pH of a 1 x 10–5 M KOH solution?

• 3

• 5

• 9

• 11