Three students studied the following solubility curve. They were asked to determine the
amount of NHC that needs to be added to
589 MH CI to create a saturated solution at
80°C
120
Student 1 said 25 g more would need
to be added, student 2 said 22 g and
student 3 said 17g NH CI needs to be
added,
Solubility (g/100g 1,0
Which student is correct? Provide
evidence from the solubility curve to
support your claim.
20

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.