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Nutka1998 [239]
4 years ago
6

Write the ka expression for an aqueous solution of nitrous acid:

Chemistry
1 answer:
lina2011 [118]4 years ago
4 0
Balanced chemical reaction (dissociation): HNO₂(aq) ⇄ H⁺(aq) + NO₂⁻(aq).
Answer is: Ka = [NO₂⁻]·[H⁺] / [HNO₂].
Ka - acid dissociation constant.
[HNO₂] - equilibrium concentration of nitrous acid.
[NO₂⁻] - equilibrium concentration of nitrite anions.
[H⁺] - equilibrium concentration of hydrogen cations.
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water and ammonia are polar. The hydrogen atoms in each have a slight positive charge. What does that tell you about the oxygen
Andreas93 [3]

Answer:

More electronegative

Explanation:

The oxygen and nitrogen in ammonia shows that they are more electronegative than the hydrogen  atoms.

  • Electronegativity shows the affinity of an atom for valence electrons.
  • Electronegativity is the measure of the relative tendency with which the atoms of the element attract valence electrons in a chemical bond.

The oxygen atom in water and the nitrogen atom in ammonia are more electronegative.

They attract the electrons more and they then become negatively charged.

The hydrogen will then become positively charged in the shared covalency.

4 0
3 years ago
Heptane and water do not mix, and heptane has a lower density (0.684 g/mL) than water (1.00 g/mL). A graduated cylinder contains
Alekssandra [29.7K]

Answer:

TRY HARD!

Explanation:

DO UR WORK ANG GET IT DONE!

3 0
1 year ago
If 10.0 mL of the solution on the right are withdrawn from the 100 mL beaker and diluted again in a similar manner, what is the
maks197457 [2]

Answer: 0.050 M NaCl

Explanation:

So the original solution is diluted from a total volume of 10.0 mL to 100.0 mL.

The M represents molarity which is moles of NaCl divided by the total solution volume in liters.

So if our original volume were to be increased by a factor of 10 then the denominator would be changed.

Here is a mathematical illustration:

5/10 = .5

5/100 = .05

3 0
3 years ago
Read 2 more answers
Which of these elements in group 1A has the largest atomic radius?
xxTIMURxx [149]
If the American system is the same, group on should be alkali metals and the answer would be frankium
5 0
4 years ago
Calculate the pH of the buffer
77julia77 [94]

Answer:

Less than 7 so it is going to be acidic.

Explanation:

A buffer solution is one that resists changes in pH when small quantities of an acid or an alkali are added to it. An acidic buffer solution is simply one which has a pH of less than 7. Acidic buffer solutions are commonly made from a weak acid and one of its salts - often a sodium salt.

5 0
3 years ago
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