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Q1. Two beakers, A and B, each contain 100.0 cm^3 of 0.0125 mol/dm^3 nitric acid. Calculate the pH of the solution formed after 50.0 cm^3 of distilled water are added to beaker A. Give your answer to 2 decimal places.

A1. First it is important to know that nitric acid (HNO3) is a strong acid and so [HNO3] = [H+] Beaker A contains 100cm^3 = 100ml Final volume is 150ml (50cm^3 of distilled water is added to beaker A) So, (1...
TD
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What is the difference between permutations and combinations?

The main difference is that order of objects matters for permutations. Both involve choosing k objects from a group of size n. Permutations are used to calculate the amount of possible ways a group can be ma...
OP
Answered by Oliver P. • Maths tutor
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How do I analyse a text to highlight and discuss issues of language and gender?

Students may discuss how men and women use language 'differently', by analysing a text in a number of ways. Students may examine differences in the following areas of language: lexis and semantics (the vocab...
HD
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Explain how the left ventricle of the heart creates higher blood pressure

The left ventricle has a thicker muscular wall and therefore produces stronger contractions.
JC
Answered by Jess C. • Biology tutor
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What is the importance of maintaining a constant body temperature in mammals?

It's very important to maintain the optimum body temperature in mammals, in particular in relation to enzymes and enzyme controlled processes. There will be the optimum temperature for enzymes where they wor...
AA
Answered by Aia A. • Biology tutor
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