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Volgvan
3 years ago
7

Consider dissolving sugar in water and magnesium sulfate in water. is any new substance being produced? what happens after sodiu

m hydroxide is added to the dissolved magnesium sulfate? does the addition of sodium hydroxide cause a new substance to appear? if so, what evidence shows this?

Chemistry
1 answer:
Olenka [21]3 years ago
8 0

Answer:

Here's what I get  

Explanation:

1. Sugar

(a) Dissolving in water

The white solid dissolves in water to give a colourless solution. There is no evidence that a new substance is being produced.

(b) Addition of sodium hydroxide

Adding the colourless solution of sodium hydroxide to the colourless sugar solution gives a colourless solution. There is no evidence that a new substance is being produced.

2. Magnesium sulfate

(a) Dissolving in water

The colourless crystals dissolve in water to give a colourless solution. There is no evidence that a new substance is being produced.

(b) Addition of sodium hydroxide

Adding the colourless solution of sodium hydroxide to the colourless solution of magnesium sulfate gives a white precipitate (see image). This is evidence that a new substance is being produced.

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Data obtained from the question include:

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Enthalpy change (ΔH) is simply defined as the difference between the heat of product (Hp) and the heat of reactant (Hr). Mathematically, it is expressed as:

Enthalpy change (ΔH) = Heat of product (Hp) – Heat of reactant (Hr)

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Note: If the enthalpy change (ΔH) is positive, it means that the product has a higher heat content than the reactant.

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