Reactivity 03

In reactivity you often have to quote values to 3 significant figures, what is this pH value 3.4689 written 3s.f.

Write this pH value of 8.4 using 3s.f.

The conjugate base of H₂O is ...

• H₃O+

• OH-

• H₂O

• All of the above

The conjugate acid of H₂O is ...

• H₃O+

• OH-

• H₂O

• All of the above

The conjugate base of HCO₃^- is ...

• H₂CO₃

• CO₃^2-

• HCO₃^-

• There is no conjugate base for HCO₃^-

The conjugate acid of HCO₃^- is ...

• H₂CO₃

• CO₃^2-

• HCO₃^-

• There is no conjugate base for HCO₃^-

The conjugate acids and bases differ by a ...

pH + pOH =

What is the pH of 0.0025 molL^-1 HCl solution (to 3sf)

• -2.60

• -2.61

• 2.61

• 2.60

What is the pH of 0.0025 molL^-1 NaOH solution (to 3sf)

• 11.4

• 11.3

• 11.4

• 11.3