[Mikez]

Hi,

I am trying to find the unknown density of a solid object by using only a 40 g of table salt and water but I have no idea where to start (my teacher hasn't given us any formulas or taught us anything about buoyancy - my teacher said to use what we've learned from physics if necessary but I haven't taken physics ). I THINK it has something to do with how the density of water changes with salt concentration and I know that adding salt increases the density of the water but I donno what to do from there.


thanks

[Borek]

If the density of solution is higher then the density of the object, it will float on the surface. If the density of solution is lower then the density of the object, it will sunk. If both are identical - it will stay where you put it.

[Mikez]

thanks but my teacher wanted us to determine the density of the object to atleast 5 decimal places. How would I find the exact or very close to exact value?

thanks

[Mikez]

I know the at the density of water is 1g/mL but after adding the salt, how would I find the density of the salt water?

[Borek]

In the density tables. You have to do the experiment in such a way that you exactly know how much salt was added so that you can calculate its concentration.