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charle [14.2K]
3 years ago
10

You have an aqueous solution with a ph of 8.0. You add sodium chloride to a concentration of 1 gram per 100 milliliters. What ha

ppens to the ph?
Chemistry
2 answers:
Marat540 [252]3 years ago
6 0

Answer:

It stays the same.

Explanation:

As seen in the question above, you are manipulating a solution that has pH 8, that is, this is a basic solution. However, you decide to add sodium chloride at a concentration of 1 gram per 100 milliliters. Sodium chloride has ph7, which means that it is a neutral substance, that is, it is not a basic or acidic molecule.

Because of its neutral character and concentration, sodium chloride will not change the pH of the solution where it was added. As a result, the solution will remain at pH 8.

zysi [14]3 years ago
4 0

Answer:

what is the ph of sodium chloride

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A dark purple liquid is diluted by adding water.
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Answer: The process is diffusion.

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Purification of copper can be achieved by electrorefining copper from an impure copper anode onto a pure copper cathode in an el
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Answer: The amount of time needed to plate 14.0 kg of copper onto the cathode is 295 hours

Explanation:

We are given:

Moles of electron = 1 mole

According to mole concept:

1 mole of an atom contains 6.022\times 10^{23} number of particles.

We know that:

Charge on 1 electron = 1.6\times 10^{-19}C

Charge on 1 mole of electrons = 1.6\times 10^{-19}\times 6.022\times 10^{23}=96500C

Cu^{2+}+2e^-\rightarrow Cu

2\times 96500=193000C is passed to deposit = 1 mole of copper

63.5 g of copper is deposited by = 193000 C

14\times 1000g=14000g of copper is deposited by =\frac{193000}{63.5}\times 14000=42551181 C

To calculate the time required, we use the equation:

I=\frac{q}{t}

where,

I = current passed = 40.0 A

q = total charge = 42551181 C

t = time required = ?

Putting values in above equation, we get:

40.0=\frac{42551181 C}{t}\\\\t=1063779sec

Converting this into hours, we use the conversion factor:

1 hr = 3600 seconds

So, 1063779s\times \frac{1hr}{3600s}=295hr

Hence, the amount of time needed to plate 14.0 kg of copper onto the cathode is 295 hours

3 0
3 years ago
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