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Chemistry
A Level

For the equilibrium reaction PCl5(g) (equilibrium arrow)-> PCl3(g) + Cl2(g) explain the effect of increasing the concentration of Chlorine gas using the equilibrium constant.

Kc=[Cl2(g)][PCl3(g)]/[PCl5(g)] for this reaction. The rate constant is not affected by changes in concentration and hence an increase in the concentration of Chlorine causes an increase in the concentrati...

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Answered by James H. Chemistry tutor
11866 Views

How do I know if an enthalpy change should be positive or negative?

A negative enthalpy change represents an exothermic change where energy is released from the reaction, a positive enthalpy change represents an endothermic reaction where energy is taken in from the surro...

Answered by Alex S. Chemistry tutor
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Which Ion from Na+ and Mg2+ has a smaller atomic radii? Explain why?

The smaller ion of the two would be Mg2+. Both ions have the same electronic arrangement so the amount of shielding occuring for both ions is the same. The key difference between the ions that ...

Answered by Tanvi B. Chemistry tutor
15923 Views

How do you form a Born-Haber cycle?

A Born-Haber cycle shows how one mole of an ionic lattice is formed from its elements in their standard states and their standard conditions. You start with the elements in their standard states, and at e...

Answered by Gabby R. Chemistry tutor
1952 Views

What is the chemical structure of metal

Metals are arranged in a regular lattice structure with the positive ions being held together via a sea of delocalised negative electrons.

Answered by Kevin Z. Chemistry tutor
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