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
serg [7]
3 years ago
5

Calculate the ph of a buffer that is 0.13m in lactic acid and 0.10m in sodium lactate.

Chemistry
1 answer:
Alona [7]3 years ago
3 0
According to Henderson–Hasselbalch Equation,

                                       pH  =  pKa + log [Lactate] / [Lactic Acid]
As,
      Ka of Lactic Acid  =  1.38 × 10⁻⁴

           pKa  = -log Ka
           pKa  = -log 1.38 × 10⁻⁴
           pKa  =  3.86
So,
                                  pH  =  3.86 + log [0.10] / [0.13]

                                  pH  =  4.74 + log 0.769

                                  pH  =  4.74 - 0.11

                                  pH  =  4.63
You might be interested in
HELP MEEEEE PLEASEEEE​
Ira Lisetskai [31]
Okay lol


shshjshdjajhs
8 0
3 years ago
Use the equation n2 + 3h2=2nh3 if 8.0g N2 react, how many grams of NH3 will be produced
Eduardwww [97]

the balanced equation for the formation of ammonia is

N₂ + 3H₂ ---> 2NH₃

molar ratio of N₂ to NH₃ is 1:2

mass of N₂ reacted is 8.0 g

therefore number of N₂ moles reacted is - 8.0 g / 28 g/mol = 0.286 mol

according to the molar ratio,

1 mol of N₂ will react to give 2 mol of NH₃, assuming nitrogen is the limiting reactant

therefore 0.286 mol of N₂ should give - 2 x 0.286 mol = 0.572 mol of NH₃

therefore mass of NH₃ formed is - 0.572 mol x 17 g/mol = 9.72 g

a mass of 9.72 mol of NH₃ is formed

6 0
4 years ago
Hey everyone, I'm starting honors chemistry next year and I want to get prepared for the class. What are the basic keys informat
11Alexandr11 [23.1K]

Answer:

hi!

Explanation:

Well, some things I would do is to know the Periodic Table font and back. Know they elements and their class and atomic number and weight. Know how many atoms make up each element and how many protons, neutrons, and elements are in each atom.

5 0
3 years ago
How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 100.0 kPa and a
Nikolay [14]

Answer:

this was the last of .the last 555543 years of 55my in

Explanation:

t

4 0
3 years ago
The mass of an atom of element x is equivalent to the total mass of 7 hydrogen atoms
Sergeu [11.5K]
Hydrogen mass is 1, the atom with mass number 7 is Lithium
4 0
3 years ago
Other questions:
  • PLEASE HELP QUICKLY WILL GIVE BRAINLIEST ANSWER
    6·1 answer
  • How many grams of sodium metal are needed to make 29.3 grams of sodium chloride? given the reaction: 2na + cl2 → 2nacl?
    10·2 answers
  • A hydrocarbon that contains only single bonds between the carbon atoms is called a(n):
    9·2 answers
  • 5.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 7
    12·1 answer
  • Which of the following is the best example of a valid hypothesis? A People should eat vegetables. B Children like Jiffy™ peanut
    11·1 answer
  • All chemical reactions use reactants in a specific proportion or stoichiometry to form products. The __________ reactant regulat
    11·2 answers
  • What type of chemical reaction is NaHCO3=Na2CO3+H2O+CO2​
    6·1 answer
  • If you start with 100 grams of hydrogen-3, how many grams will you have after 24.6 years?
    15·1 answer
  • At 303 K, the volume of a gas is 30.0 ml. At constant pressure, what is the new
    11·1 answer
  • Help! Science Question! Brainliest can be yours!!!
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!