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Explain how a catalyst can effect the rate of a forward and reverse reaction.

A catalyst can provide a different mechanism or pathway for a chemical reaction through stabalistion of the transition state. The catalyst will lower the activation energy of the reaction meaning a greater n...
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Answered by Kieran N. • Chemistry tutor
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Palladium acts as a heterogeneous catalyst in the reaction between an alkene with hydrogen by providing an alternative reaction route. Describe the stages of this reaction route. (3 marks)

The detail required for many A-level questions is indicated in the number of marks available. As this question awards 3 marks, 3 separate points must be made. For example, the first stage of a heterogeneous ...
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Answered by Amy S. • Chemistry tutor
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Explain the process of synaptic transmission.

The arrival of an action potential at the presynaptic neurone causes voltage gated Ca2+ channels to open, allowing Ca2+ to diffuse into the synaptic knob. The increased intracellular Ca2+ concentration in th...
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Answered by Sophia M. • Biology tutor
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Discuss measures to reduce an imbalance in the current account?

One way a government might try and reduce an imbalance in the current account is by using contractionary fiscal policy· Reducing government spending and increasing taxes· By reducing government spending, you...
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Answered by Dilan A. • Economics tutor
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Integrate Sin^2(x)

(using double angle formula)Sin^2(x)=1/2-(Cos(2x)/2) So the Integral is 1/2(x-1/2Sin(2x))which simplifies to x/2 - 1/2Sin(x)Cos(x)
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Answered by Alex R. • Maths tutor
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