Recent content by matthew77ask

I saw an exam question that ask the students to explain the process of electoplate barium onto a piece of copper rod Can some body help me to explain why is it not possible?

Also, when we use CuSO4 for reaction calculations, when we use Mr(CuSO4) and when do we use Mr(CuSO4.5H20) ? seems that all CuSO4 are blue - containing the 5H2O Many thanks...

Opps! I am trying to combine the two equations: 5CuO + 5H2SO4 --> 5CuSO4 + 5H2O CuSO4 + 5H2O --> CuSO4.5H2O Adding them 5CuSO4 + 5H2O --> CuSO4.5H2O correct? thanks.

5CuO + 5H2SO4 --> 5CuSO4 + 5H2O CuSO4 + 5H2O --> CuSO4.5H2O 5CuO + 5H2O --> CuSO4.5H2O correct? thanks.

Hi, Logically CuSO4.5H2O., but If I use CuSO4.5H2O then what to display in the equation ? and how to balance it? or just balance without 5H20? [why?]

I was tasked to calculate the yield of CuSO4 by the reaction of H2SO4 and CUO. My equation says the it should get CUSO4 and H2O. But should we use CUSO4.5H2O for theoretical yield instead since it is a crystal that we are calculating - if so then I could not balance the equation... what...

You are right - I do need an in solid course in electrochemistry. When I came up with the combinations - my focus is on the graphite electrodes - and the rest of the components was "done in a fly". Thank you for pointing these out like the Cu2+ with NaOH - did not think of that..(now I learn...

Sorry, I was not clear... What I really wanted to find out is : In chemical Cells - if the electrodes are Copper (solid) and Graphite (instead of the usual cells with two different metals) in a electrolyte of aq NaOH, will it works? What about if it is Magnesium(solid) and Graphite instead -...

I know about how for Mg/Fe cell : -the Mg is more reactive than Fe so gives off electrons and hence becomes the negative electrode. However, I am confuse with Cu/Graphite; and Zn/ Graphite Because one is metal while the other is not - but just a conductor of electricity. My guess is that...

Thanks. If that is the case, can the combination work? Cu/Graphite; and Zn/ Graphite and which is the + terminal and - terminal? Many thanks

In normal chemical cells, the electrodes are two different metals so that the more reactive one gives off electrons and create a flow of electrons and hence electricity. [the electrolyte is say NaOH aq or whatever] Just wondering - is it possible to have a chemical cell consisting of: a)...

it's confusing at the cathode - cos both Ag+ (from the anode) and Cu2+ (from the electrolyte ) are present. Its more of a simple set up without going into too much details. Its for O level type of question. Concentration - aqueous solution.

I have a question on electrolysis: In the electrolysis of aq Copper (II) Chloride using silver electrodes, what are the products? Cathode : Copper or silver are deposited here? cos both are in the solution anode : silver electrode decrease in size... with silver deposits? Am I correct?

I am very sorry for the lack of clarity in written english language. Yes sir, this is what it means: measured amount of NaOH needed to neutralize DIFFERENT initial volumes of HCl solution? ah - many times, when we speak we can understand - but when we write - it has to be more specific ...

Sorry - I mean the plot of the initial volume of HCl on x-axis and the number of drops of NaOH added. ie Not the total volume (NaOH + HCl). Hence my reasoning is that we are plotting the number of moles required for neutralization. So it should be a y = mx straight line. Am I correct...