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OlgaM077 [116]
3 years ago
15

when some ionic salts are dissolved in water the reaction is exothermic when others are dissolved in water the reaction is endot

hermic. Why
Chemistry
1 answer:
antiseptic1488 [7]3 years ago
5 0
One type of chemical process that can be either exothermic or endothermic is dissolving of salts in water. A salt is a compound made up of positively charged ions and negatively charged ions which are held together in a solid state because the positive and negative charges attract one another.
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What is the total mass of NaNO3 that must be added to 70g in 100 grams of H2O to make a saturated solution at 30°C ?
dimulka [17.4K]

Answer:

58g

Explanation:

In order to solve this problem, you must take a look at the solubility graph for potassium nitrate.

Now, the solubility graph shows you how much solute can be dissolved per 100g of water in order to make an unsaturated, a saturated, or a supersaturated solution.

You're looking to make a saturated potassium nitrate solution using

50g of water at 60∘C. Your starting point will be to determine how much potassium nitrate can be dissolved in 100g of water at that temperature in order to have a saturated solution.

As you can see, the curve itself represents saturation.

If you draw a vertical line that corresponds to 60∘C and extend it until it intersects the curve, then draw a horizontal line that connects to the vertical axis, you will find that potassium has a solubility of about

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3 years ago
What is the process that is commonly used to assure desirable characteristics, or traits, in the offspring of animals?
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4 years ago
Read 2 more answers
Consider a box divided in half. One side is filled with 1 mol Ne at 300. Kelvin, and the other is filled with 1 mol Rn at 300. K
vlada-n [284]

It will take the Ne gas approximately 1.2 s to equilibrate between the two sides.

We know that the time taken for a gas to diffuse is dependent on the molar mass of the gas. This is one of the interpretations of Graham's law of diffusion in gases. Thus, Let;

t1 = time taken for Rn to equilibrate = 4.0 s

t2 = time taken for Ne to equilibrate = ?

M1 = molar mass of Rn = 222g/mol

M2 = molar mass of Ne = 20 g/mol

Using

t1/t2 = √M1/M2

4/t2 = √222/20

4/t2 = 3.33

t2 = 4/3.33

t2 = 1.2 seconds

Learn more about diffusion in gases: brainly.com/question/879602

3 0
3 years ago
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