Chemistry Test ...

A 19^th century iron bridge is protected from corrosion by connecting it to a block of metal (sacrificial anode), which is replaced annually. The corrosion of iron, represented by the chemical equation:

Which of the following metals is best suited as sacrificial anode:

The cell potential for the following electrochemical system at 25°C is:

Al(s) | Al³⁺ (0.01 M) || Fe²⁺ (0.1 M) | Fe (s)

Given: Standard reduction potential of Al³⁺ + 3e^– → Al is –1.66 V at 25°C

Standard reduction potential of Fe²⁺ + 2e^– → Fe is –0.44 V at 25°C

The species present in solution when CO₂ dissolved in water, are

The reduction potential of an element A is 1.71 V. What can be concluded from this?

Aerated water contains CO₂ dissolved in water

Variation of solubility (s) with pressure (p) is shown by

Which of the following involves a redox reaction?

The equilibrium constant of the reaction:

E° = 0.46 V at 298 K is

Solubility of MX₂-type eletrolytes is 0.5 × 10^–4 mole/lit, then find out K_sp of electrolytes