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Ilya [14]
3 years ago
15

What is ion exchange ​

Chemistry
1 answer:
dolphi86 [110]3 years ago
3 0

Answer:

ion exchange is the exchange of ions of the same charge between an insoluble solid and a solution in contact with it, used in water-softening and other purification and separation processes.

Explanation:

hope this helped !

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A 25.0 mL NaOH solution of unknown concentration was titrated with a 0.189 M HCl solution. 19.6 mL HCl was required to reach the
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Answer:

0.172 M

Explanation:

The reaction for the first titration is:

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First we <u>calculate how many HCl moles reacted</u>, using the <em>given concentration and volume</em>:

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As one HCl mol reacts with one NaOH mol, <em>there are 3.704 NaOH mmoles in 25.0 mL of solution</em>. With that in mind we <u>determine the NaOH solution concentration</u>:

  • 3.704 mmol / 25.0 mL = 0.148 M

As for the second titration:

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We <u>determine how many NaOH moles reacted</u>:

  • 34.9 mL * 0.148 M = 5.165 mmol NaOH

Then we <u>convert NaOH moles into H₃PO₄ moles</u>, using the <em>stoichiometric coefficients</em>:

  • 5.165 mmol NaOH * \frac{1mmolH_3PO_4}{3mmolNaOH} = 1.722 mmol H₃PO₄

Finally we <u>determine the H₃PO₄ solution concentration</u>:

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Petrified wood contains minerals that are only found in fossils.

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