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Chemistry
A Level

24.3cm^3 of 0.02moldm-3 KMnO4 reacted with 20cm^3 of iron (II) solution. Calculate the molarity of the iron (II) solution.

Firstly calcuate the moles of KMnO4 by using the equation n=MV/1000 where n=moles M=molarity (moldm-3) and V= volume (cm3). As the question gives the molarity and volume of KMnO4 you...

Answered by Anya B. Chemistry tutor
9589 Views

What is a buffer, and how does it respond to the addition of acid or alkali?

Firstly, I would try and establish with the tutee what a buffer is and define it. Going through the key aspects of what a buffer is. The standard definition I have for a buffer is 'A solution that minimis...

Answered by Tom W. Chemistry tutor
2176 Views

What factors affect acidity in solution?

Approach this question in a logical manner breaking it down into constituent parts and then explaining these in turn.

  1. Give a defination for acidity i.e. pH: pH=-log10[H+] or pKa=-long10Ka...

Answered by Theo R. Chemistry tutor
1715 Views

2-chloropropanoic acid has a Ka of 1.48E-3. Write an expression for Ka and hence or otherwise, calculate the pH of a 0.35M solution of 2-chloropropanoic acid

In these multiple part questions, it is often the case that the previous part of the question will provide necessary information for answering the following parts, as hinted by the use of 'hence'. It's ve...

Answered by Colin M. Chemistry tutor
7157 Views

What is the electron arrangement for a Co atom?

Look up Co on the periodic table. Proton number is 27. Therefore, the number of electrons is 27.

1s2, 2s2, 2p6, 3s2, 3p6, 3d7, 4s

Answered by Emma P. Chemistry tutor
1847 Views

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