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
NemiM [27]
3 years ago
9

The leaves of the rhubarb plant contain high concentrations of diprotic oxalic acid (hooccooh) and must be removed before the st

ems are used to make rhubarb pie. if pka1 = 1.23 and pka2 = 4.19, what is the ph of a 0.0356 m solution of oxalic acid?
Chemistry
1 answer:
Andrei [34K]3 years ago
5 0
First we have to find Ka1 and Ka2
pKa1 = - log Ka1 so Ka1 = 0.059
pKa2 = - log Ka2  so Ka2 = 6.46 x 10⁻⁵
Looking at the values of equilibrium constants we can see that the first one is really big compared to second one. so, the pH will be affected mainly by the first ionization of the acid.
Oxalic acid is H₂C₂O₄
H₂C₂O₄      ⇄     H⁺   + HC₂O₄⁻
0.0356 M            0          0
0.0356 - x            x          x
Ka1 = \frac{[H^+][HC2O4^-]}{[H2C2O4]} = x² / 0.0356 - x
x = 0.025 M
pH = - log [H⁺] = - log (0.025) = 1.6
You might be interested in
How can you determine whether its bonds are ionic or covalent?
cestrela7 [59]
There is a couple different ways to determine if<span> a </span>bond<span> is </span>ionic or covalent<span>. By definition, an </span>ionic bond<span> is between a metal and a nonmetal, and a </span>covalent bond<span> is between 2 nonmetals. So you usually just look at the periodic table and </span>determine whether<span> your compound is made of a metal/nonmetal or is just 2 nonmetals</span>
5 0
4 years ago
How are alpha, beta and gamma radiation characterized in terms of mass and charge?
Anarel [89]
Beta radiation - negative charge and the mass of an electron
Gamma radiation- no mass and no charge
Alpha radiation- He 4+/2
7 0
3 years ago
Gravity is responsible for the
Degger [83]
Orbiting path of planets
4 0
3 years ago
A stable nuclei will have equal numbers of
Marina86 [1]

Answer:

Protons and Neutrons

Explanation:

8 0
3 years ago
Read 2 more answers
Calculate the density of chlorine gas in g/l, at stp.
vichka [17]
The Answer would be e: 3.2 g/L 

<span>At STP : p = 1 atm and T = 273.15 K 
molar mass Cl2 = 70.906 g/mol 

d = molar mass x p/RT = 70.906 x 1 atm / 0.08206 x 273.15=3.16 g/L</span>
8 0
4 years ago
Other questions:
  • Concerning the 10.0 mL of 0.50 M NaCl to 100 mL of solution:
    13·1 answer
  • When the disk of the moon masks the disk of the sun, it creates a _________ eclipse.
    8·2 answers
  • Balance: __Nacio; → _NaCl + __02
    5·1 answer
  • Which methods would be suitable for determining the concentration of an aqueous solution of KMnO4? I. Visible spectrophotometry
    9·1 answer
  • What might appear in a plains ecoregion after a heavy rain
    8·1 answer
  • Which condition is most responsible for causing wind?
    8·1 answer
  • What is the boiling point, melting point, and triple point of bromine?
    7·1 answer
  • For a particular reaction, Δ H ∘ = 20.1 kJ/mol and Δ S ∘ = 45.9 J / (mol ⋅ K). Assuming these values change very little with tem
    9·1 answer
  • The amount of matter in an object is called
    14·1 answer
  • Std 10th
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!