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BARSIC [14]
4 years ago
13

AlCl3 + NaOH —> Al(OH)3 + NaCl

Chemistry
1 answer:
victus00 [196]4 years ago
6 0

Hey there!

AlCl₃ + NaOH → Al(OH)₃ + NaCl

Balance OH.

1 on the left, 3 on the right. Add a coefficient of 3 in front of NaOH.

AlCl₃ + 3NaOH → Al(OH)₃ + NaCl

Balance Cl.

3 on the left, 1 on the right. Add a coefficient of 3 in front of NaCl.

AlCl₃ + 3NaOH → Al(OH)₃ + 3NaCl

Balance Na.

3 on the left, 3 on the right. Already balanced.

Balance Al.

1 on the left, 1 on the right. Already balanced.

Our final balanced equation: AlCl₃ + 3NaOH → Al(OH)₃ + 3NaCl

Hope this helps!

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the phase change in which a substance changes from a soild toa gas or vapor without changing to a liquid first is
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How much heat is absorbed by a 112.5 g sample of water when it is heated from 12.5 °C to 92.1 °C? (Specific heat capacity of wat
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Answer:

\boxed {\boxed {\sf37,467.72 \ Joules }}

Explanation:

We are asked to find how much heat a sample of water absorbed. Since we are given the mass, temperature, and specific heat, we will use the following formula.

q=mc \Delta T

The mass (m) of the sample is 112.5 grams. The specific heat capacity of water (c) is 4.184 Joules per gram degree Celsius. The difference in temperature (ΔT) is found by subtracting the initial temperature from the final temperature.

  • ΔT= final temperature - initial temperature

The water was heated from 12.5 degrees Celsius to 92.1 degrees Celsius.

  • ΔT= 92.1 °C - 12.5 °C= 79.6°C

Now we know three variables and can substitute them into the formula,

  • m= 112.5 g
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q= (112.5 \ g )(4.184 \ J/g \textdegree C)(79.6 \textdegree C)

Multiply the first 2 numbers. Note the units of grams cancel.

q= (112.5 \ g *4.184 \ J/g \textdegree C)(79.6 \textdegree C)

q= (112.5  *4.184 \ J/ \textdegree C)(79.6 \textdegree C)

q= (470.7 \ J/ \textdegree C)(79.6 \textdegree C)

Multiply again. This time the units of degrees Celsius cancel.

q= (470.7 \ J/ \textdegree C *79.6 \textdegree C)

q= (470.7 \ J *79.6 )

q= 37467.72 \ J

37, 467.72 Joules of heat are absorbed by the sample fo water.

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