Solution Number 1
2
3
Salt amount is
16.0
11.7
7.2
3.4
0.0
Water
(ml)
60
60
60
60
60
Food coloring (drops)
2 Blue
2 Green
2 Yellow
1 Yellow, 1 Red
2 Red
5
Calculations:
1. Determine the density of each solution layer by using the calculation listed below:
Example: Solution #1
Mass = 16.0 g salt + 60 g water = 76.0 g solution
Volume = 60 ml water
Density = Mass/Volume = 76.0 g/60 mL = 1.27 g/mL
Solution #
Density
1
2
3
5
No

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chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.