1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tasya [4]
2 years ago
9

A 31.25 mL aliquot of weak base that has a concentration of 0.683 M will be titrated with 0.434 M HCl. Calculate the pH of of th

e solution upon neutralization of half of the weak base. The Kb of the base is 1.5×10-6.
Chemistry
1 answer:
Pavel [41]2 years ago
4 0

Answer:

pH = 8.18

Explanation:

The weak base, X, reacts with HCl as follows:

X + HCl → HX⁺ + Cl⁻

<em>Where 1 mole of X with 1 mole of HCl produce 1 mole of HX⁺ (The conjugate acid of the weak base).</em>

Now, using H-H equation for bases:

pOH = pKb + log [XH⁺] / [X]

<em>Where pOH is the pOH of the buffer (pH = 14 -pOH)</em>

<em>pKb is -log Kb = 5.824</em>

<em>And [X] [HX⁺] are the molar concentrations of each specie</em>

Now, at the neutralization of the half of HX⁺, the other half is as X, that means:

[X] = [HX⁺]

And:

pOH = pKb + log [HX⁺] / [X]

pOH = 5.824 + log 1

pOH = 5.824

pH = 14-pOH

<h3>pH = 8.18</h3>
You might be interested in
What is a catalyst?
luda_lava [24]

a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.

 -  a person or thing that precipitates an event.

7 0
3 years ago
Read 2 more answers
If you know any of them that helps!
WARRIOR [948]

Answer:

for the how to get a carrot to float you would need to make a hole in it and make it hollow

Explanation:

6 0
2 years ago
Part A: You are given a beaker containing a solution of an enzyme that hydrolyzes adenosine triphosphate (ATP) while it generate
Oksi-84 [34.3K]

Answer:

1) magnesium chloride

2) b) The copper is getting oxidized from Cu+ to Cu2+ and turns blue.

Explanation:

The work published by David N. Frick, Sukalyani Banik, and Ryan S. Rypma in J Mol Biol. 2007 Jan 26; 365(4): 1017–1032 clearly shows that divalent metal ions of group 2 such as Mg^2+ play an important role in ATP hydrolysis. Addition of EDTA decreased the rate of hydrolysis of ATP (due to sequestration of the divalent ion of group 2) indicating an active participation of divalent ions in the process.

2) The copper I ion is colourless because it is a d^10 specie. However, when it is oxidized to Cu^2+, a blue colour appears in the solution.

4 0
3 years ago
Where all broken angeles but just because you got broken wings dont mean you can't fly. &lt;3
Brut [27]
Make more poems      +                        pleeeeeeees :3
6 0
3 years ago
Read 2 more answers
Use the following information to answer the following question.
Irina-Kira [14]

Answer:

For these problems, we need to compare the theoretical yield that we'd get from performing stoichiometry to the actual yield stated in the problem. % yield is the actual yield/theoretical yield x 100%  

Cu + 2 AgNO₠→ Cu(NOâ‚)â‚‚ + 2 Ag ==> each mole of copper yields two moles of silver  

12.7-g Cu x ( 1 mol Cu /63.5-g Cu) x ( 2 mol Ag / 1 mol Cu) x (108-g Ag / 1 mol Ag) = 43.2-g Ag. This is the theoretical yield. Now, since we got 38.1-g Ag our % yield is:  

38.1-g/43.2-g x 100% = 88.2%

Explanation:

5 0
2 years ago
Other questions:
  • Is there any way to predict the exact location of any one marble drop on the target?
    5·1 answer
  • A.explain what is meant by term
    12·1 answer
  • Which of the following are held together by nonpolar convalent bonds?
    7·1 answer
  • The chemical formula for artificial sweetener is C7H5NO3S. How many carbon atoms will be found in 5 molecules of the artificial
    13·1 answer
  • What is the mass of three moles of chlorine?
    13·2 answers
  • How many significant figures are in 8.00 (10)-3
    8·1 answer
  • What is the percent-by-mass, %(m/m), concentration of sucrose ( table sugar) in a solution made by dissolving 22.8 g of sucrose
    15·2 answers
  • Licopene, a red pigment found in tomatoes, has the empirical formula C5H7, and its molecular mass is found to be approximately 5
    11·1 answer
  • Please help Please Help
    8·1 answer
  • A student spends 4.5 hours studying for a test. How much time is this equivalent to in seconds
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!