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Where does the water come from that is given off when making an ester?

One hydrogen (-H) from the alcohol group (-OH) on the alcohol breaks off and joins with the alcohol (-OH) group that breaks off of the carboxylic acid (-COOH).

So the -H from alcohol joins the...

Answered by Hannah P. • Chemistry tutor

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Define the "standard enthalpy change of atomisation".

This is a standard definition question that is relatively common in A level papers.

Answered by Daniel G. • Chemistry tutor

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What is an ionic bond?

An ionic bond is an electrostatic interaction between a cation(positive) and an anion(negative). These bonds are formed when a metal forms a compound with a non-metal.

Metals lose electrons an...

Answered by Olivia P. • Chemistry tutor

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What is the effect of temperature on K(equilibrium constant)?

For this question we need to consider the equation:

ΔStotal = ΔSsystem - ΔH/T

For and exothermic reaction, -ΔH/T is po...

Answered by Olivia P. • Chemistry tutor

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What is the relationship between K and ΔS total?

ΔStotal=RlnK

This equation means that if ΔStotal is large and positive then K is large (much greater than 1) and the position of equilibrium is well to the right (due to the equation ΔStotal =...

Answered by Olivia P. • Chemistry tutor

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