State the type of bond that forms between the following elements:   (1 mark each) a) N and O b) Ca and Br c) C and F

Which one of the following pairs of substances will not form a precipitate in a solution?

A chemist dissolves 45 g of acetic acid in enough water to prepare two litres of solution. a) What is the molar concentration of this acetic acid solution?     (3 marks) b) What is the concentration of H+ ions?    (3 marks)

In the energy diagram below, which letter represents the activation energy?

What is the maximum voltage that can be produced by an electrochemical cell with the following electrodes? a) Copper (I) and lead     (3 marks) b) Zinc and lithium     (3 marks)

Explain Le Châtelier’s Principle.   (2 marks)

A Brönsted -Lowry base is defined as a(an):

A 0.2 M solution of formic acid has a pH of 5.0.  What is its Ka value?

In which of the following reactions does HNO3 act as a base?

Consider the following table: What is the molecular shape of the following molecules?   (1 mark each) a)    H2S                                   b)    SF6                                   c)    BaF2                                 d)    PH5