ATAR Chemistry Revision | Baamboozle - Baamboozle

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List 2 observations for the reaction between: Chromium(III) nitrate solution and magnesium ribbon

silver/grey solid dissolves | blackish/grey/silver solid forms | solution becomes less green/colourless

Give the 4 characteristics of Chemical Equilibrium

only in a closed system | rate of forward reaction = the rate of reverse reaction | no change in macroscopic properties | can be attained from either direction

Using collision theory, explain the effect of removing reactant particles on the equilibrium system

less reactant particles colliding, forward reaction slows down; reverse reaction rate intially stays the same; overall, there's a shift backwards

State the optimum conditions and the catalyst used in the Haber Process

T=450C; P=200atm; Fe catalyst

State the Le Chatelier's Principle

"If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change"

Draw the structure of a biodiesel

(biodiesel structure)

Identify this amino acid

cysteine

Name this molecule

2,3-dimethylbut-2-ene

Name this molecule

2-methylhexan-3-one

Identify this amino acid

valine

Name this molecule

butyl methanoate

Name this molecule

heptan-2-amine

Draw the stucture of glycerol

(glycerol structure)

Draw the structure of a soap

(soap structure)

Identify this amino acid

glycine

Give 3 differences of soap and detergent

soaps are carboxylate salts, det are sulfonate salts; soaps are from fats/oils, det are petro products; soaps form scum in hard water, det dont

State 2 reasons why galvanic cells need a salt bridge.

maintains charge neutrality | completes the circuit | allows transfer of ions between two half-cells | prevents polarisation.

Explain how detergents are able to remove grease from a surface by referring to the intermolecular forces present.

(mentions IMF between det and water; IMF between det and grease; mentions agitation and being washed away)

Draw the structure of a simple triglyceride

(triglyceride structure; hydrophobic chains represented by R)

List 2 observations for the reaction between: Iron filings and dilute hydrochloric acid

colourless, (odourless) bubbles /effervescence/gas | silver/grey solid dissolves | (pale) green solution formed

Explain how temperature affects the rate of reaction

more particles have E > Ea AND increase in collision frequency

What is a buffer solution?

A solution that resists pH change when a small amount of strong acid/base is added to it

Name this molecule

Pentanamide

Give 2 ways to prevent corrosion of metals

galvanization (using sacrificial anode); painting/greasing

Identify this amino acid

tryptophan

Name this molecule

3-chloropropanal