If you have a 1.0 m aqueous solution of nacl, by how much will it increase the water’s boiling point, if kb = 0.512 °c/m? in other words, what is the boiling point elevation (increase)?

The elevation in boiling point is 1.024°C.

Explanation:

To calculate the elevation in boiling point, we use the equation:

where,

i = Van't Hoff factor = 2 (for NaCl)

= change in boiling point  = ?

= boiling point constant =

m = molality = 1.0 m

Putting values in above equation, we get:

Hence, the elevation in boiling point is 1.024°C.

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.