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stepladder [879]
3 years ago
6

When preparing the diazonium salt, the solution is tested with potassium iodide-starch paper. a positive test is the immediate f

ormation of a blue color. what is the ki-starch paper testing for ? explain?
Chemistry
1 answer:
Dahasolnce [82]3 years ago
8 0
KI-starch paper allows the detection of strong oxidizers such as nitrite. It is used here to control diazotization of 4-nitroaniline. Nitrite oxidizes potassium iodide in order to form elemental iodine which reacts with starch to a blue-violet complex. With KI-starch paper, enough sodium nitrite is added to produce nitrous acid, which <span>then will react with 4-nitroaniline to form a diazonium salt.</span>
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Which is easy to demonstrate using ideal gas equation:

p1 = nRT/V = 2.0 mol * RT / 1 liter

p2 = nRT/V = 1.0 mol * RT / 1 liter

=> p1 / p2 = 2.0 / 1.0 = 2 => p1 = 2 * p2

2) Assuming that when the valve is opened there is not change in temperature, there will be 1.00 + 2.00 moles of gas in a volumen of 2 liters.

So, the pressure in both chambers (which form one same vessel) is:

p = nRT/V = 3.0 mol * RT / 2liter

which compared to the initial pressure in chamber 1, p1, is:

p / p1 = (3/2) / 2 = 3/4 => p = (3/4)p1

So, the answer is that the pressure in the chamber 1 decreases to 3/4 its original pressure.

You can also see how the pressure in chamber 2 changes:

p / p2 = (3/2) / 1 = 3/2, which means that the pressure in the chamber 2 decreases to 3/2 of its original pressure.
5 0
3 years ago
Scientists have developed the Atomic Theory over a period of hundreds of years. What will help us further the development? A. in
stepladder [879]

Answer:

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8 0
3 years ago
Plz help me with this:
In-s [12.5K]

Answer:

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Explanation:

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3 years ago
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postnew [5]

Answer:Rubidium and Strontium

Explanation:

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KIM [24]
<span>it is limited to situations that involve aqueous solutions of specific compounds

I hope this helps</span>
8 0
3 years ago
Read 2 more answers
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