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This question asks students to identify the reason why the data book value for the reaction of ethanoic acid 4 with sodium hydroxide gives a value of H o = – 56.1 kJ mol –1 (which

if the equilibrium constant is very much less than one (pK a value is high). However, you also need to consider the intitial concentration of the acid, c o , because if this is

(You won’t be able to say for sure exactly what the pH will be.) What you need to know is which acid and which base will react to form a particular salt (cf reaction (1) above),

In order to establish which of the molecules given in this question can exist as a pair of enantiomers you need to find one that has no plane of symmetry, which means that, in

(The hydrogen bond investigated in the experiment is a very weak one, but then it involves carbon rather than the more usual nitrogen, oxygen or fluorine atoms.) Strengths

Quando si pone ad un interlocutore inglese una “yes or no question”, solitamente egli non si limita a rispondere solo “sì” o “no”, ma utilizza invece quella che viene

The mark in part A is obtained by giving 3 points to correct answers, -1 to wrong answers.. A bonus equal to the number of correct answers minus 4 has been given in

A bonus of 0.5 was given for each correct answer after the 4th At least 4 correct answers required in Part A to get the pass mark.. 3 bonus points were given to the part