Jose makes two mixtures. mixture one contains 10 g of salt dissolved in 50 ml of water. mixture two contains 20 g of salt dissolved in 50 ml of water. compare the concentrations of the two mixtures.

The second mixture is more concentrated in terms of the solute or salt content compared to the first mixture where they have the same volume of solvent (the water). Moreover, the salt of the first mixture dissolve much faster compare to the second mixture where it needs more time to completely dissolve the salt, which is twice in quantity of mixture one.

wavelength divides in half and speed stays the same.