We have these textbooks available for sale or swap, as we no longer do the OCR scheme. We have three of each (year 1 AS and year 2). If anyone is interested, please message me and we can negotiate a price of swap deal. Thanks!
We have trialed this one so many times and just don't seem to get any results. We are using the correct TLC plate (with fluorescein), the 60:40 hexane/ethyl ethanoate solvent stated, and methylated spirit to dissolve the tablet powders in. We get nothing with a UV light. I tried an...
Possibly a stupid question, so apologies in advance, but I'm just preparing the AQA Redox practical where you titrate acidic iron tablet solution with potassium manganate(vii) solution. I would usually make KMnO4 up in dilute sulfuric, but titrating acid against acid seems odd... Do I...
We've been doing a bit of a stock-take and have found four 1:1/10:1 Probe HZ154 HAMEG probes (pictured below), to be used with an oscilloscope (I think!) Does anybody know exactly what they're for and how to use them? TIA.