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3 years ago

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Chemistry

1 answer:

aniked [119]3 years ago

5 0

I’m sorry but I don’t understand your question do you have the worksheet?

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Alum is a compound used in a variety of applications including cosmetics, water purification, and as a food additive. It can be

vlabodo [156]

Answer:

The theoretical yield of alum is 19.873 grams and percent yield for this alum synthesis is 45.33%.

Explanation:

Mass of bottle = 10.221 g

Mass of bottle with aluminium pieces = 11.353 g

Mass of aluminium = 11.353 g - 10.221 g = 1.132 g

Mass of alum and bottle = 19.230 g

Mass of alum = 19.230 g - 10.221 g = 9.009 g

Experimental yield of alum = 9.009 g

Theoretical yield of alum:

$2Al(s) +2 KOH(aq) +4H_2SO_4(aq)+10 H_2O(l) \rightarrow 2 KAl(SO_4)_2.12 H_2O(s)+3H_2(g)$

Moles of aluminium = $\frac{1.132 g}{27 g/mol}=0.041926 mol$

According to reaction, 2 moles of aluminum gives 2 moles of alum.

Then 0.041926 mol aluminium will give :

$\frac{2}{2}\times 0.041926 mol=0.041926 mol$ of alum.

Mass of 0.041926 moles of alum:

0.041926 mol × 474 g/mol= 19.873 g

Theoretical yield of alum = 19.873 g

Percentage yield:

$\% Yield =\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100$

Percentage yield of the alum:

$\% Yield =\frac{ 9.009 g}{19.873 g}\times 100=45.33\%$

The theoretical yield of alum is 19.873 grams and percent yield for this alum synthesis is 45.33%.

7 0

4 years ago

List three forms of energy.

Liula [17]

The different types of energy include thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy and gravitational energy.

you could use any of these.

4 0

3 years ago

Read 2 more answers

How do the data support your claim above?

Ksenya-84 [330]

Is this a question ...

8 0

3 years ago

Read 2 more answers

Consider the reaction between 15.0 mL of a 1.00 M aqueous solution of AgNO3 and 10.0 mL of a 1.00 M aqueous solution of K2CrO4.

Neporo4naja [7]

Answer:

Species present in the solution after complete reaction: $K^+ ,CrO_4^- , Ag_2CrO_4 , K^+ ,NO_3^-$

Explanation:

First balance the chemical equation,

$2AgNO_3 + K_2CrO_4 =Ag_2CrO_4 + 2KNO_3$

calculation of mili moles of each:

$mili mole= volume in ml \times molarity$

mili mole of AgNO3= 15mili mole;

mili mole of K2CrO4=10 mili mole;

From balance equation,

2 mili mole of AgNO3 reacts with 1 mili mole of K2CrO4

hence 1 mili mole of AgNO3 reacts with 0.5 mili mole of K2CrO4

15 mili mole of AgNO3 reacts with 7.5 mili mole of K2CrO4

so only 7.5 milimole will be used in the reaction and 2.5 mili mole left in solution.

species present in the solution after complete reaction:

$K^+ ,CrO_4^- , Ag_2CrO_4 , K^+ ,NO_3^-$

$K_2CrO4 , KNO_3$ are soluble in water so it will dissociate in the solution

7 0

4 years ago

What is the measure of how likely an atom is to react with another element

GarryVolchara [31]

When nonmetal atoms with differing electronegativities react, they form molecules with polar covalent bonds. Each element has an electronegativity value, which is a measure of the ability of an atom to attract and share electron pairs of another atom. Are you looking for the electronegativity value? I think this is correct

4 0

3 years ago