where does the mass increase of water when we add salt or sugar in it
Answers
Answer:
because not only are you adding more mass to the solution, some of the water molecules essentially move further apart both of which increase volume. When you add salt to water it breaks down into sodium and chloride ions. ... So if you add a teaspoon of sugar to a teaspoon of water you will still have 10x more water molecules.
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Explanation:
**If salt dissolves in water to make a saturated solution there is about a 2.5% reduction in volume. This is due to hydration of the ions by the water molecules.**
Referring specifically to sodium chloride as "salt", observations show densities to be higher than expected if there was no volume change (i.e. the volume of the pure solvent summed with the volume of the pure salt). This indicates that the volume decreases with the addition of salt.
This may not be true for all salts. What we are looking at here are partial molar properties, specifically Partial Molar Volume. This is (in basic terms) the volume contribution of an individual component to the total volume of a mixture or solution. This changes with the concentration of the component and with a number of other factors (temperature, pressure and the concentration of other components).
It arises because of interactions between the different molecules. Sometimes this causes volume contraction, sometimes expansion. There are some pretty complicated models that look at predicting this.
**In case of sugar there would not be any change till the saturation point because at saturation point we cannot dissolve more sugar in water it means there should be some gap in molecules of water where molecules of sugar gets settled before saturation. It does increase after the saturation point though !!**
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