Recent content by Russell

One way out of that is to make it up into a standard solution as soon as you get the stuff. I'll leave you to do your own sums, but 1 kilogramme could probably be made-up to two litres without exceeding saturation. Then 100ml is equivalent to 50 grammes of the stuff. In practice you choose the...

It is. As Aleman said, there is nothing better out there for the price. It would be nice to know why they have changed things, but one assumes that it is an improvement and for the better.

The trouble is that judging the end-point using the types of indicator dye suitable for this type of test is quite difficult. Unlike some indicator dyes, there is not an abrupt transition, and there are intermediate colours over quite a wide pH range, which confuses things. It seems that...

Well, the indicator does not take part in the reaction. It would a pretty dumb kit if the indicator made a significant difference to the result - If that were the case we would be measuring the indicator with a calibrated pipette too. "Two drops" is hardly very precise. Water with a significant...

Two drops of indicator solution or four drops isn't going to make ha'porth of difference, except that you are more likely to see the colour change with four drops. It is probably a revision rather than a misprint. How the hell can they misprint something that was already in print, unless they...

It is clear from the link that you posted that the capacitor is not a motor capacitor as such, not as start capacitor nor a phase shifting capacitor, but simply an interference suppression capacitor. It will run without it, no problem, technically illegally though. It seems to have blown the...

Aleman was right about that particular author. His water treatment stuff is complicated and it appears to be based upon flimsy science. Even JP seems to be distancing himself from the JP way, if you read between the lines of what he says in some of his podcasts. It was the suggestion that none...

Now this smacks of someone who is writing a book. There is often a prelude to someone writing a book, inasmuch as they spend a lot of time attacking previous authors in the false belief that it will enhance their own status. Now Aleman has been pretty efficient here; he as managed 'dis' every...