OCR B Salter's Chemistry by Design F335 - 15th June 2015 Watch
Temp. under 250 wasn't used as rate of reaction greater at higher temperatures. More kinetic energy, more frequent collisions etc.
I think the most interesting one is that 80% ofn those polled for F334 said it was hard or very hard
I think what she means is (or at least the part that got me) was the fact that it's understood that ice is less dense than water but it's the "at the same temperature" part as logically ice and water don't exist at the same temperature because the whole point of it being "ice" is that the temperature has been reduced to a point where water has changed state. However if the textbook meant in hypothetical terms that if water and ice were to exist in the same temperature then ice would be less dense than water due to the spaces that exist. I think! If I've just confused things even more then I'm sorry!
How'd you find it though?
For the last question, it could also be heat with fehling's solution and it would be red when it turns into a carboxylic acid?
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