Chemistry - CH4 - Extracting metals and equilibria

What factor determines the reactivity of a metal?

How easily the atoms of that metal lose their outer electrons

Do metals react violently or gently with acid?

Violently

Metal + acid →.

Salt + hydrogen

Complete the displacement reaction: magnesium + hydrochloric acid →

magnesium chloride + hydrogen

What is a displacement reaction?

A more reactive metal displaces a less reactive metal

What is oxidation in terms of oxygen?

The gain of oxygen

What is reduction in terms of oxygen?

The loss of oxygen

What are redox reactions?

When oxidation and reduction take place at the same time

What is oxidation in terms of electrons?

Loss of electrons

What is reduction in terms of electrons?

Gain of electrons

What is sustainable development?

Meeting the current demands of the current generation without damaging the lives of future generations

What is the purpose of lice cycle assessments?

To assess the environmental impact of products

During a reversible reaction, what happens as the reaction progresses and the reactants react?

The concentration of the reactants fall, forward reaction slows down, concentration of products rise and the backward reaction speeds up

What is equilibrium?

When the rate of forward reaction is equal to the rate of backward reaction

What is dynamic equilibrium?

Forward and backward reactions are happening but there is no overall effect because the are at the same rate

What condition is required for a reaction to reach equilibrium?

A closed system

What does it mean if the position of the equilibrium lies to the right?

The concentration of products is greater than the concentration of the reactants

What does it mean if the position of the equilibrium lies to the left?

The concentration of reactants is greater than the concentration of the reactants

What are three factors affecting equilibrium?

Temperature, pressure and concentration

What is Le Chateliers principle?

If you change the conditions of a reversible reaction at equilibrium, the system will try to counter that change in order to restore the equilibrium