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What is enthalpy and how can it be calculated?

Enthalpy is a thermodynamic property that chemists can use to describe the heat energy transferred throughout a chemical reaction. It is especially useful given that it is defined as "a measure of heat ...
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A) The compound butan-2-ol reacts with acidified potassium dichromate(VI) to form a new compound. Give the IUPAC name of the Product. B) 2,2-dimethyl butan-2-ol was subjected to the same conditions. State and explain the outcome

A) butan-2-one. [1 mark] B) 2,2-dimethyl-butan-2-ol is a tertiary alcohol so it is not oxidised and would be recovered unreacted [2 marks]
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Using diagrams, describe the difference between Ionic, Covalent and Metallic Bonding.

Ionic bonding is the electrostatic forces of attraction between a metallic and non-metallic ion. The metallic ion has a positive charge because it loses an electron. For example, with KCl (Potassium Chloride...
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Answered by Eliza B. • Chemistry tutor
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How do you prepare an insolvent salt by precipitation?

Firstly, add two solutions of soluble compounds. Eg when making MgCl 2 , add Magnesium Nitrate and Sodium Chloride, as these two solutions are soluble. Then, mix the two solutions together in a beaker, filte...
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Answered by Keira H. • Chemistry tutor
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At 25 °C, the initial rate of reaction is 3.1 × 10−3 mol dm−3 s−1 when the initial concentration of C is 0.48 mol dm−3 and the initial concentration of D is 0.23 mol dm−3 . Calculate a value for the rate constant at this T when rate = k [C][D].

The rate equation is given. So the first step is rearranging it to make the rate constant k the subject of the equation, by dividing both sides by [C][D]. k = (rate/[C][D]) now plug in the values given in th...
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Answered by Krystof C. • Chemistry tutor
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