False
it would probably smudge the lens or something
<span>pH = pKa + log ([R-]/[RH])
Where pH is the pH of the buffer, [R-] is the concentration of the basic species, and [RH] is the concentration of the acidic species.
At pH 2.4, the amino group on glycine (pKa = 9.6) will be, for accounts and purposes, 100% protonated. This means our buffer will be dealing with the two ionic forms of the carboxyl group (pKa = 2.4).
When pH = pKa, the two species are in equilibrium. This can be seen using the HH equation:
2.4 = 2.4 + log ([R-]/[RH])
0 = log ([R-]/[RH])
1 = ([R-]/[RH])
[RH] = [R-]
Now we add in another equation, our conservation of mass.
M = [RH] + [R-]
where M is the molarity of the buffer
But since [RH] = [R-]:
M = 2 [RH]
0.2 = 2 [RH]
And we wind up with:
[RH] = [R-] = 0.1 M
Now to figure out the moles of each needed, we multiply by the volume of the buffer.
0.1 M * 0.1 L = 0.01 mol
This shows that to make 100 ml of 0.2 M glycine buffer, we'll need 0.01 mol of each species.
0.01 mol of 0.5 M HCl:
0.5 mol HCl / 1 L = 0.01 mol / v
solve for v
v/1 = 0.01 / 0.5 ==> v = 0.02 L or 20 mL
weight of glycine:
MW: 75.07 g/mol
0.01 mol glycine * (75.07g glycine / 1 mol) = 0.75 g glycine
And there's your answer
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To make this buffer you would add 0.75g glycine to 20 mL of 0.5 M HCl and fill with water until a 100mL volume was achieved.</span>
Answer:
In this work of art, Van Gogh took into cognizance the colors of this place as he painted it, so that he could freely express more about the place as an artist.
Explanation:
The Night Café: "I have tried to express with red and green the terrible passions of human nature." is a beautiful and unique way Van Gogh used to describe that the spot has a terrible and pathetic psychological effects on people.
He used the following colours; a quirk-feverish yellow, a fierce red, and a sickly green to show feelings of sorrow, loneliness and a disturbing lingering.
When a viewer interacts with these colors, they are able to see that this colours are muddy, gross and gives a sick feeling.
In conclusion, it can be deduced that colours in paintings are essential as they convey human expressions and feelings.
it could be used in design for:
delivering a clearer design