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Temka [501]
3 years ago
6

Describe how a crystal of alum differs from a crystal of potassium aluminum sulfate

Chemistry
1 answer:
laiz [17]3 years ago
7 0
An alum is a double salt where you have a trivalent metal sulfate and a monovalent metal sulfate. Meanwhile, a crystal of potassium aluminum sulfate is potash alum!
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The correct answer is Th-234
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WILL BE MARKED THE BRILLIENST what is density?
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Density is how much matter is packed into a certain substance. So it's a measure of how tightly packed particles are. If particles are tightly packed, they will be more dense and if they're loosely packed they will be less dense. Normally, something solid will be more dense than something liquid. So density is how much matter there is a certain amount of space or volume.

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4 years ago
A chemist uses a standard solution of 0.210 M lithium hydroxide (LiOH) to titrate 28.10 mL of sulfurous acid acid (H2SO3), she f
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Answer:

0.0827M of H₂SO₃

Explanation:

LiOH reacts with H₂SO₃ to produce water and Li₂SO₃, thus:

2LiOH + H₂SO₃ → 2H₂O + Li₂SO₃

<em>Where 2 moles of lithium hydroxide react with 1 mole of sulfurous acid.</em>

As the chemist requires 22.14mL = 0.02214L of a 0.210M solution to neutralize the acid, moles of LiOH are:

0.02214L × (0.210mol / L) =<em>0.004649 moles of LiOH</em>.

As 2 moles of LiOH react with 1 mole of H₂SO₃, moles of H₂SO₃ are:

0.004649 moles of LiOH ₓ (1 mole H₂SO₃ / 2 mol LiOH) =

<em>0.002325 moles of H₂SO₃</em>

These moles are present in 28.10mL = 0.02810L. Thus, molar concentration of the acid is:

0.002325 moles H₂SO₃ / 0.02810L = <em>0.0827M of H₂SO₃</em>

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