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nignag [31]
3 years ago
9

Select the statements that correctly describe a buffer. a) An acid added to the buffer solution reacts with the weak base of the

buffer. b) The pH of a buffer solution is determined by the ratio of the concentration of conjugate base to the concentration of strong acid. c) A buffer is generally made up of a weak acid and its conjugate base. d) The pH of a buffer solution does not change significantly when any amount of a strong acid is added. e) The Ka of a buffer does not change when any amount of an acid is added to the buffer solution.
Chemistry
1 answer:
Tom [10]3 years ago
3 0

Answer:

  • <em>(B.) The pH of a buffer solution is determined by the ratio of the concentration of conjugate base to the concentration of strong acid.</em>
  • <em>(C.) A buffer is generally made up of a weak acid and its conjugate base. </em>
  • <em>(D.) The pH of a buffer solution does not change significantly when any amount of a strong acid is added.</em>

Explanation:

A buffer is  solution which resists change in pH upon addition of either acids or bases.

The pH of a buffer is calculated by the ratio of the concentration  of base to concentration of acid. The weak acid and conjugate base have a Ka similar to the pH desired.

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denis23 [38]

Consumption of a synthetic material being increased, leads to an associated negative impacts to Earth required to produce it is a True statement.

<h3>What is a Synthetic material?</h3>

There are the materials which are made by humans through chemical synthesis which are usually done in factories.

The production of this type of materials leads to the emission of chemicals and other gases which are harmful and negatively impacts the environment.

Read more about Synthetic material here brainly.com/question/24357817

8 0
2 years ago
A chemist added an excess of sodium sulfate to a solution of a soluble barium compound to precipitate all of the barium ions as
grigory [225]

Answer:

  259.497 mg,   58.84%

Explanation:

BaSO₄ → Ba²⁺ + SO₄²⁻

to calculate the mole of BaSO₄

mole BaSO₄ = mass given / molar mass = 403 mg / 233.38 g/mol = 1.7268 mol

comparing the mole ratio

1.7268 mol of BaSO₄ yields 1.7268 mol of Ba²⁺

403 mg BaSO₄  yields     ( 1.7268 × 137.327 ) where 137.327 is the molar mass of Barium mol of Ba²⁺

441 mg BaSO₄  will yield   ( 1.7268 × 137.327  × 441 mg ) / 403 mg = 259 .497 mg

mas percentage of the Barium compound = 259 .497 mg / 441 mg × 100 = 58.84%

8 0
3 years ago
_____ Na3PO4 + _____ KOH   arrow  _____ NaOH + ___________K3PO4 <br> How do I balance this equation?
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The answer is na3po4+3koh=3naoh+k3po4
6 0
3 years ago
What would be an example of a land form from magma?
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6 0
3 years ago
Fatty acids spread spontaneously on water to form a monomolecular film. A solution containing 0.10 mm^3 of a fatty acid is dropp
lara31 [8.8K]

Divide the volume by the area. Using scientific makes things a bit cleaner.

0.10\,\mathrm{mm}^3 = 10^{-1}\,\mathrm{mm}^3

400.\,\mathrm{cm}^2 = 4\times10^2\,\mathrm{cm}^2

Then

\dfrac{10^{-1} \,\mathrm{mm}^3}{4\times10^2\,\mathrm{cm}^2} \cdot \dfrac{\left(\frac{1\,\rm m}{10^3\,\rm mm}\right)^3}{\left(\frac{1\,\rm m}{10^2\,\rm cm}\right)^2} = \dfrac{10^{-1}\times10^{-9} \,\mathrm m^3}{4\times10^2\times10^{-4}\,\mathrm m^2} = \dfrac{10^{-10}}{4\times10^{-2}}\,\mathrm m \\\\ ~~~~~~~~= 0.25\times10^{-8}\,\mathrm m

Now, 1 m = 10⁹ nm, so

0.25 \times10^{-8}\,\mathrm m \cdot \dfrac{10^9\,\rm nm}{1\,\rm m} = 0.25\times10^1\,\mathrm{nm} = \boxed{2.5\,\rm nm}

8 0
1 year ago
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