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Dennis_Churaev [7]
3 years ago
13

Given that a theoretical yield for isolating Calcium Carbonate in this experiment would be 100%. From that information and based

on the results you obtained in this experiment, describe your success in the recovery of calcium carbonate and suggest two possible sources of error that would have caused you to not obtain 100% yield.
Chemistry
1 answer:
Stels [109]3 years ago
8 0

Answer:

It's well Explained below.

Explanation:

First of Excess product of CaCO_3 would be produced due to the fact that there would not be enough CaCl_2 to react with Na_2•CO_3. The main purpose of having stoichiometric quantities is for us to know the correct amount or near the correct amount of each reactant in order to create a product that will be close to the theoretical amount and thus have a higher percent yield.

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An element is a _____ substance represents by a ______ symbol. Chemical symbols have ___ or ___ letters. The first letter of a c
Inessa05 [86]

Answer:

Explanation:

An element is a _distinct____ substance represented by a __chemical____ symbol. Chemical symbols have _one__ or _two__ letters. The first letter of a chemical symbol is always a _Capital_____ letter and the second letter is always a _small_____ letter.

Elements are distint substances that cannot be split up into simpler substances. Such substances are made up of one kind of atom. Each of them is usually symbolised by a capital letter or a capital letter followed by a small letter derieved from the English or latin or greek name of the element.

6 0
3 years ago
Use the reaction: 2 C4H10 (g) + 13 O2 (g) → 8 CO2 (g) + 10 H2O (g) + 5720 kJ. In the reaction, 200.0g of hydrocarbon react with
Sophie [7]

Answer:

9842kJ of energy are released

Explanation:

Based on the reaction:

2 C₄H₁₀ (g) + 13 O₂ (g) → 8 CO₂(g) + 10 H₂O (g) + 5720 kJ

<em>When 2 moles of C₄H₁₀ react with 13 moles of O₂ there are released 5720 kJ of energy</em>

As molar mass of C₄H₁₀ is 58.12g/mol, moles in 200.0g of the hydrocarbon are:

200.0g C₄H₁₀ ₓ (1mol / 58.12g) =<em> 3.441 moles of C₄H₁₀</em>

<em> </em>

As 2 moles of C₄H₁₀ release 5720kJ of energy, 3.441 moles of C₄H₁₀ release:

3.441 moles C₄H₁₀ ₓ (5720kJ / 2 moles C₄H₁₀) = <em>9842kJ of energy are released</em>

8 0
3 years ago
Can the excess reactant control the percentage yield? <br><br> Please answer
Marina CMI [18]

Answer:

Yes, it can.

Explanation:

The percentage yield is decreased if the reactants do not completely form the products. To make a given mass of product, a process with a low percentage yield requires more of the reactants than a process with high percentage yield.

5 0
3 years ago
Read 2 more answers
How many unpaired electrons does niobium have
yaroslaw [1]
There is 1 unpaired electrons 
The innermost shell has 2 electrons. 
<span>The next shell has 8 electrons. </span>
<span>The next shell has 18 electrons. </span>
<span>The next shell has 12 electrons </span>
<span>The most outer shell has just 1 single electron (no pairs)
</span>have a good day :)
3 0
3 years ago
Which statement best describes a true solution?
kari74 [83]

Option C: a true solution will not separate in a centrifuge.

A solution is said to be a true solution if the solute particles form homogeneous mixture with the solvent. In a homogeneous mixture, the size of the particle of solute is less than 1 nm, can not be seen from naked ice. In such solutions, the solute particles completely dissolves in solvent in all proportions and cannot settle down at bottom if kept at rest for some time.

As complete dissolution of solute takes place, there is no cloudy appearance in the true solution also, once the solution is formed solute and solvent particles can not be separated with simple processes such as heating, boiling and centrifugation.

For example, solution of sugar and water, sugar particles completely dissolve in water to form homogeneous mixture or true solution.

Therefore, a true solution will not separate in a centrifuge.




6 0
3 years ago
Read 2 more answers
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