A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157 g of the compound produced 0.213 g of CO2 a
1 answer:
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This requires familiarity with the different theories (or concepts) of acids and bases.
On the Arrhenius concept, an acid is a substance that produces an H⁺ ion in water such that the H⁺ concentration increases, and a base is a substance that produces an OH⁻ ion in water such that the OH⁻ concentration increases.
On the Brønsted–Lowry concept, an acid is a substance that donates a proton (which is basically an H⁺ ion) in a solvent, and a base is a substance that accepts a proton in a solvent.
On the Lewis concept, an acid is a substance that accepts an electron pair in a solvent, and a base is a substance that donates an electron pair in a solvent.
The concepts become progressively broader, i.e., the Arrhenius concept is the most restrictive and the Lewis concept is the least restrictive. As a corollary, an Arrhenius acid or base is also both a Brønsted–Lowry acid or base and a Lewis acid or base, respectively; a Brønsted–Lowry acid or base is not necessarily an Arrhenius acid or base, but an Arrhenius acid or base is also a Lewis acid or base, respectively. And finally, a Lewis acid or base may not necessarily be either an Arrhenius or a Brønsted–Lowry acid or base.
So, with the above concepts in mind, we can match the statements in column A with the type of acid or base in column B:
Answer:
Answer is explained in the explanation section below.
Explanation:
Solution:
Note: This question is incomplete and lacks very important data to solve this question. But I have found the similar question which shows the profiles about which question discusses. Using the data from that question, I have solved the question.
a) We need to find the major species from A to F.
Major Species at A:
1.
Major Species at B:
1.
2.
Major Species at C:
1.
Major Species at D:
1.
2.
Major Species at E:
1.
Major Species at F:
1.
b) pH calculation:
At Halfway point B:
pH = pK + log[
]/[H
]
pH = pK = 6.35
Similarly, at halfway point D.
At point D,
pH = pK + log [H
]/[H2
]
pH = pK = 10.33
<u>Answer:</u> The correct answer is Option D.
<u>Explanation:</u>
To calculate the moles of a solute, we use the equation:
We are given:
Volume of sulfuric acid = 450mL = 0.45 L (Conversion factor: 1 L = 1000 mL)
Molarity of the solution = 0.5 moles/ L
Putting values in above equation, we get:
For the given chemical reaction:
By Stoichiometry of the reaction:
1 mole of sulfuric acid reacts with 2 moles of sodium bicarbonate.
So, 0.225 moles of sulfuric acid will react with = of sodium bicarbonate
To calculate the mass of sodium bicarbonate, we use the equation:
Moles of sodium bicarbonate = 0.45 moles
Molar mass of sodium bicarbonate = 84.007 g/mol
Putting values in above equation, we get:
Hence, the correct answer is Option D.