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aksik [14]
4 years ago
14

What is the best method for removing water from a hydrated compound?

Chemistry
2 answers:
Readme [11.4K]4 years ago
7 0

Answer:

  • Heating to remove water of crystallization
  • Passing through a drying agent (deliquescent or hygroscopic substances)

Explanation:

If solid/crystals, compound can be dried by applying heat to remove the water of crystallization.

Drying agents are also utile in removing moisture from compounds in a dessicator. Substances which absorb water from air can be used as drying agents for gases. For instance, CaCl_{2}, CaO or silica gel is suitable for drying gases, depending on reactivity of the substance.

Hatshy [7]4 years ago
6 0

Answer:

Heating is the best method

Explanation:

When a mass of crystals containing Water of crystallization is heated sufiiciently to a high temperature, water vapor may be driven off the crystals by the action of heat alone.

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A chemist used 6.5 moles of water in this reaction. How many grams of water were used?
denpristay [2]

Answer:

\boxed {\boxed {\sf 120 \ or \ 117 \ grams \ H_2O \ depending \ on \ significant \ figures }}

Explanation:

We want to convert from moles of water to grams of water.

First, find the molar mass of water (H₂O) Look on the Periodic Table for the masses of hydrogen and oxygen.

  • Hydrogen (H): 1.008 g/mol
  • Oxygen (O): 15.999 g/mol

Next, add up the number of each element in water. The subscript of 2 comes after the H, so there are 2 moles of hydrogen.

  • 2 Hydrogen: (1.008 g/mol*2) = 2.016 g/mol

Finally, add the molar mass of 2 hydrogen and 1 oxygen.

  • 2.016 g/mol (2 Hydrogen) + 15.999 g/mol (1 oxygen)= 18.015 g/mol

Next, find the grams in 6.5 moles.

Use the molar mass we just found as a ratio.

molar \ mass \ ratio: \frac{18.015 \ g \ H_2O}{1 \ mol \ H_2O}

We want to find the grams in 6.5 moles. We can multiply the ratio above by 6.5

6.5 \ mol \ H_2O * \frac{18.015 \ g \ H_2O}{1 \ mol \ H_2O}

Multiply. Note that the moles of H₂O will cancel each other out.

6.5 * \frac{18.015 \ g \ H_2O}{1}

6.5 * {18.015 \ g \ H_2O}

117.0975 \ g \ H_2O

If we want to round to the technically correct significant figures, it would be 2 sig figs. The original measurement, 6.5, has 2 (6 and 5).

\approx 120 \ g \ H_2O

6 0
3 years ago
3.87 moles of iron bromide yielded10.4 moles of sodium bromide
Roman55 [17]

Answer: 89.57 %

<em>Hope it helps</em>

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4 years ago
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As you get higher the atmospheric pressure lowers. The pressure in the packet of crisps has the pressure at which it has been closed (pressure at the surface of the earth). This means that the air molecules in the packet press harder outside than the air molecules in the atmosphere press on the packet.
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4 years ago
What is the electronic configuration of the atom x​
Fofino [41]

Answer: K L M. 2 8 6.

Explanation:

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3 years ago
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poizon [28]
A. to push each other away
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