Chemistry of cooking T4 L5
What does -> mean
..................<-
A reversible reaction
Give an example of a reversible reaction
NH⁴Cl(s)->NH³(g) + HCl(g)
..............<-
What is HCl(g) in an aqueous solution(aq)
Hydrochloric acid
Give 2 examples practicle of a reversible reaction
Cotton wool soaked in ammonia gas and another soaked in HCl gas and put in glass tubing.
Wait for gasses to diffuse in tubing creating a white ring of ammonium chloride.
Thermal decomposition of ammonium chlordie
Heating ammonium chloride splits it into hydrogen chloride gas and ammonia gas(endothermic)
Cooling these products produces ammonium chloride again(exothermic)
NH⁴Cl(s) <->NH³(g) + HCl (g)
Hydration of copper (ll) sulfate
Mixing anyhrous copper sulfate and water it turns blue. Equally you can remove the water turning it into a white powder.
CuSO⁴ (s) + 5H²O<->CuSO⁴•5H²O(s)
Name 2 example of thermal decomposition
Thermal decomposition of 1.ammonium chloide
2.metal catbonates to produce carbon dioxide e.g copper carbonate
What is dynamic equilibrium
The reactions which will occur in both directions at the same rate whilst maintaining the same concentration of products and reactants
Does a catalyst effect the position of equilibrium
No
Why do catalysts not Effect the position of equilibriumin a irreversible reaction.
It inceases the rate in both directions equally so therefore doesnt have an effect
What is the effect of the change in pressure and temperature in the position of equilibrium
Increase(decrease) in temperature shifts the position of equilibrium in the direction of the endothermic(exothermic)reaction
An increase (or decrease) in pressure shifts the position of equilibrium in the direction that produces fewer(or more) moles of gas
What is the position of equilibrium
The proportion of components. If there are more products than reactants the position lies to the right (vise versa)