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3 years ago

Why iodide ions cannot be determined by Mohr method

Chemistry

1 answer:

pickupchik [31]3 years ago

8 0

Answer:

Exactly the same approach can be used for determination of bromides. Other halides and pseudo halides, like I- and SCN-, behave very similarly in the solution, but their precipitate tends to adsorb chromate anions making end point detection difficult.

Hope it helps!

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What is the molality of the resulting solution when 15.0 g of Licl is combined with 105 g of water? 0/1 point 0 1.42 m 2.95 m 3.

xenn [34]

Answer:

3.37 m

Explanation:

<u>Number of moles of solute present in 1 kg of solvent is termed as molality</u>

It is represented by 'm'.

Thus,

$Molality\ (m)=\frac {Moles\ of\ the\ solute}{Mass\ of\ the\ solvent\ (kg)}$

Given that:

The mass of LiCl = 15.0 g

Molar mass of LiCl = 42.394 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{15.0\ g}{42.394\ g/mol}$

$Moles= 0.3538\ mol$

Mass of the solvent = 105 g

Also, 1 g = 0.001 g

So,

Mass of water (solvent) = 0.105 kg

Molality is:

$Molality\ (m)=\frac {0.3538}{0.105}\ m$

<u>Molality = 3.37 m</u>

3 0

3 years ago

If element X has 82 protons, how many electrons does it have?

wariber [46]

An element has no charge so its protons must be balanced with its electrons
so if X has 82 protons then it must have 82 electrons so that the atoms sum of charges adds up to 0

hope that helps

5 0

4 years ago

3. A light bulb containing argon gas is switched on,

Readme [11.4K]

Answer:

The assumption is quite reasonable.........

A lightbulb contains Ar gas at a temperature of 295K and at a pressure of 75kPa. The light bulb is switched on, and after 30 minutes its temperature is 418 K. What is a numerical setup for calculating the pressure of the gas inside the light bulb at 418K?

Explanation:

given constant

, and constant

, conditions that certainly obtain with a fixed volume light bulb.

And so

⋅

295

⋅

418

⋅

≅

100

⋅

Had the light bulb been sealed at normal pressure during its manufacture, what do you think might occur when it is operated?

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3 years ago

True or false - Evaporating, condensing, melting and freezing are all examples of chemical change.

Fittoniya [83]

False because they can turn back to their original form a chemical change would be like burning paper it can’t be changed back to it’s original offer it’s burnt

3 0

3 years ago

Read 2 more answers

I don't know if this is a chemistry question but I need help its a science question from what I know!

Alex17521 [72]

Answer:

The 3 rd answer

Explanation:

Atomic number is the number of protons in the nucleus of that element...

Mass number is the the sum of protons and neutrons in the nucleus of the atom..

6 0

3 years ago

Why iodide ions cannot be determined by Mohr method​

Why iodide ions cannot be determined by Mohr method