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How does an increase in temperature affect the rate of a chemical reaction?

An increase in temperature will increse the rate of a chemical reaction, and a decrease in temperature will decrese the rate. This is because the hotter the reactant particles are, the more kinetic energy th...
VE
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Please use the VSEPR theory to predict the shape of NH3 and the approximate bond angles

The student should draw the lewis structure - this should be worked through using the whiteboard 2. From the lewis structure it can be identified that NH3 has 3 bonds and one lone pair of electrons 3. Theref...
AG
Answered by Alisha G. • Chemistry tutor
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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 concentration ...
JH
Answered by James H. • Chemistry tutor
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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 surround...
AS
Answered by Alex S. • Chemistry tutor
93587 Views

Which Ion from Na+ and Mg2+ has a smaller atomic radii? Explain why?

The smaller ion of the two would be Mg 2+ . 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 causes the M...
TB
Answered by Tanvi B. • Chemistry tutor
21305 Views