Top answers

a) How can an element be classified as a transition metal, considering only electronic arrangement? (1 mark) b) In terms of electrons, why is aqueous copper(II) sulphate solution red? (3 marks) c) EDTA is a bidentate ligand. What is a bidentate ligand?(2)

a) Partially filled/incomplete d shell. b) Light is absorbed by an electron, exciting it and is promoted to a higher energy d orbital. The colour seen is the complimentary colour of that absorbed (in this ca...
JO
Answered by James O. • Chemistry tutor
2748 Views

25cm^3 of 0.1M NaOH is reacted with 0.01M HCl until the equivalence point is reached. What volume of HCl was required to be added?

0.025 dm^3 x 0.1 mol dm^-3 = 0.0025 molsince mols must be equal:mols of HCl = 0.0025/0.01 =250cm^3To get to the answer I would first check the student was first able to identify the key words and numbers in ...
GW
3230 Views

What is the impact of a price ceiling on a market equilibrium?

Define a price ceiling as a maximum price that a seller is allowed to charge for a good or service. Examples include rent controls and medication.Assume that we are currently at an equilibrium where p=p* and...
BS
Answered by Balram S. • Economics tutor
3247 Views

(The question is too long so it's marked at the top of the answer space, sorry for any inconveniences)

Question: Particle P of mass m and particle Q of mass km are moving in opposite directions on a smooth horizontal plane when they collide directly. Immediately before the collision the speed of P is 5u and t...
XW
Answered by Xudong W. • Maths tutor
5223 Views

Integrate (3x^2 - (1/4)x^-2 + 3) dx

3x 2 -(1/4)x -2 +3 Split the problem into three separate terms and integrate independently.With any term where x is to the power of something, divide the coefficient by the value of the power plus 1 .e.g. 3x...
LL
Answered by Lucy L. • Maths tutor
5144 Views