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
Olin [163]
3 years ago
13

You wish to prepare an HC2H3O2 buffer with a pH of 4.24. If the pKa of is 4.74, what ratio of C2H3O2 /HC2H3O2 must you use?

Chemistry
1 answer:
LenaWriter [7]3 years ago
3 0

To solve this problem, we can use the Henderson-Hasselbalch Equation which relates the pH to the measure of acidity pKa. The equation is given as:<span>

<span>pH = pKa + log ([base]/[acid])                ---> 1</span></span>

Where,

[base] = concentration of C2H3O2 in molarity or moles

<span>[acid] = concentration of  HC2H3O2 in molarity or moles</span>

 

For the sake of easy calculation, let us assume that:

[base] = 1

[acid] = x

<span>
Therefore using equation 1,
4.24 = 4.74 + log (1 / x) 

<span>log (1 / x) = - 0.5

1 / x = 0.6065 </span></span>

x = 1.65<span>

The required ratio of C2H3O2 /HC2H3O2 <span>is 1:1.65 or 3:5. </span></span>
You might be interested in
Sea water is an electrolyte.<br> True<br> False
antoniya [11.8K]
If you are talking about just pure regular water, the answer is false. BUT, some salts dissolved IN WATER, can act as electrolytes. But regular water, no.
8 0
3 years ago
Read 2 more answers
What is the net ionic equation of the reaction of mgso4 with sr(no3)2?
Bad White [126]

Balanced chemical reaction:  

MgSO₄(aq) + Sr(NO₃)₂(aq) → Mg(NO₃)₂(aq) + SrSO₄(s).

Ionic reaction:  

Mg²⁺(aq) + SO₄²⁻(aq) + Sr²⁺(aq) + 2NO₃⁻(aq) → Mg²⁺(aq) + 2NO₃⁻(aq) + SrSO₄(s).

Net ionic reaction:

Sr²⁺(aq) + SO₄²⁻(aq) → SrSO₄(s).

Magnesium sulfate (MgSO₄), strontium nitrate (Sr(NO₃)₂ and magnesium nitrate (Mg(NO₃)₂) are soluble in water. Strontium sulfate (SrSO₄) is not soluble in water.

This chemical reaction is double displacement reaction - cations and anions of the two reactants switch places and form two new compounds.


6 0
3 years ago
Read 2 more answers
What conversion factor does a balanced chemical equation give you?
Dmitriy789 [7]
From google but i can explain further if needed. <span> The </span>balanced<span> equation for the reaction of interest contains the stoichiometric ratios of the reactants and products; these ratios </span>can<span> be used as </span>conversion factors<span> for mole-to-mole </span>conversions<span>.</span>
7 0
4 years ago
Support a scientist doing and experiment in nuclear fusion starts out with twelve atoms how many atoms will most likely results
vlada-n [284]
What context do they ask you?
5 0
3 years ago
1.Bubbling or fizzing is an indicator of
hodyreva [135]
D is the answer since it is changing the element.
6 0
3 years ago
Other questions:
  • Ba2+(aq)+SO42−(aq)→BaSO4(s)
    7·1 answer
  • Match each type of chemical bond with its properties. Drag the items
    11·1 answer
  • Define and give an example of an acid and of a base.
    7·1 answer
  • How many moles of copper (Cu) are in 65.8 g Cu?
    14·2 answers
  • You work for a company focused on environmental cleanup. Your job is to collect soil samples in the field and bring
    5·1 answer
  • How long will it take for a 750 mg sample of radium with a half life of 15 days to decay to exactly 68mg?
    10·1 answer
  • Slkjflsdfjsfjlsm d dd dd dld dld dd;s dpd<br><br>.
    9·1 answer
  • Zinc metal can be obtained from Zinc Oxide by reaction at high temperature with CO. The CO is obtained from burning C in limited
    5·1 answer
  • Use the kinetic energy equation to explain why speed has a greater impact on kinetic energy than mass.​
    10·1 answer
  • In a given population, which members are most likely to survive and produce offspring?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!