Yeah, but if your pH is below 7 or above 8 you’ve got bigger problems anyway. Water temperature also plays a part in the equation, apparently, but charts like these help get the concept.
Yeah water temp would influence it.
Been awhile since I’ve done any chemistry, most calculation standards are done at room temperature, so 20c or so, not sure if +/- 10c from that is going to be overly influential. Temperature is much more linear compared to the logarithmic pH.
There is probably redox(orp) rate calculation somewhere based on temp. TDS also potentially effects orp, more dissolved solids should increase your orp, but TDS isn’t limited to chlorine…