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gayaneshka [121]
3 years ago
14

How to titrate cocacola because of its dark colour

Chemistry
2 answers:
ivolga24 [154]3 years ago
7 0

<u>Answer and Explanation</u>

<em>__________________________________________________________</em>

<em>All of the Information below is not owned by me, it is owned by CCBCMD.</em>

<em>__________________________________________________________</em>

<em>Colas are also carbonated beverages. The carbonation can produce some carbonic acid in the  Cola, which would affect your results. Therefore, to ensure that you are only titrating the  phosphoric acid you will use de-carbonated soda. This can easily be obtained by gently  heating the soda, or as you may already know, by rapidly shaking the bottle. It is also important that we do not use diet Colas since the artificial sweeteners that they contain have  acidic functional groups that will also interfere with the titration.</em>

<em>__________________________________________________________</em>

<h2>1</h2>

<em>Use a 25.00-mL pipet to deliver exactly 25.00 mL of room temperature, de-carbonated </em>

<em>Cola into a 250-mL beaker. Check out a magnetic stir bar and gently add it to the </em>

<em>beaker. Place the beaker on a stir plate. Set up a pH meter so that the probe is   completely immersed, but in a way that the stir bar will not hit it. The tip of the probe </em>

<em>has a thin glass membrane. Handle it with care! Position the beaker so that the stir bar </em>

<em>is as close to the center of the beaker as possible for optimal stirring. It should stir </em>

<em>rapidly enough to ensure thorough mixing but not so rapidly as to cause splattering. </em>

<em>__________________________________________________________</em>

<h2>2</h2>

<em>Obtain about 75 mL of 0.0100 M NaOH in a beaker. Use this NaOH to fill a buret. </em>

<em>Remember that you should always rinse a buret 2-3 times with the solution that you are </em>

<em>about to put into it and remove air bubbles at the buret tip. If you do not remember how </em>

<em>The initial level of the NaOH should be at exactly </em>

<em>0.00 mL. Once the buret is ready, place it over the beaker containing the Cola</em>

<em>__________________________________________________________</em>

<em>Hope this helps! <3</em>

<em>__________________________________________________________</em>

Bas_tet [7]3 years ago
4 0

Answer:

add baking soda maybe

Explanation:

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false

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How many grams of NaOH are<br> needed to make 400. mL of<br> 1.50 M solution?
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Answer:

24g of NaOH are required

Explanation:

Molarity, M, is an unit of concentration widely used in chemistry defined as the ratio between moles of solute (In this case, NaOH), and volume of solution in liters.

We can find the moles of NaOH and its mass with the volume and desired concentration as follows:

<em>Moles NaOH:</em>

400.0mL = 0.400L * (1.50mol / L) = 0.600 moles NaOH

<em>Mass NaOH -Molar mass: 40.0g/mol-:</em>

0.600 moles * (40.0g / mol) =

<h3>24g of NaOH are required</h3>
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Which of the following actions will not increase the rate at which a solid dissolves in
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O lowering the temperature of the system

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On which of the following objects will the earth exert a greater gravitational pull than on a baseball?
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The human body excretes nitrogen in the form of urea, NH₂CONH₂. The key step in its biochemical formation is the reaction of wat
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Mass perventage of nitrogen in urea, arginine, ornithine is   46.67%, 32.2%,21% respectively.

What is Mass perventage ?

Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100.

Molecular mass of urea (NH2CONH2) is= 2× (Atomic mass of N ) + 4 × (Atomic mass of H) + (Atomic mass of C) (Atomic mass of O) = 60

Mass percentage of N = Total mass of N atoms in the compoundMass of compound×100=2860×100=46.67%

chemical formula for arginine is C6H14N4O2

molar mass of C6H14N4O2=174g/mol

moles of N atoms in C6H14N4O2=4

mass of N atoms=14*4=56g

mass percent of N in C6H14N4O2=(56/174)*100=32.2%

the chemical formula for ornithine is C5H12N2O2

molar mass of C5H12N2O2=132g/mol

moles of N atoms in C5H12N2O2=2

mass of N atoms in C5H12N2O2=2*14=28

mass percent of N in C5H12N2O2=(28/132)*100=21%

To learn more about urea click on the link below:

brainly.com/question/17812875

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