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
Harlamova29_29 [7]
3 years ago
8

Calculate the pH of a buffer solution prepared by mixing 60.0 mL of 1.00 M lactic acid and 25.0 mL of 1.00 M sodium lactate.

Chemistry
1 answer:
marshall27 [118]3 years ago
4 0
This problem could be solved easily using the Henderson-Hasselbach equation used for preparing buffer solutions. The equation is written below:

pH = pKa + log[(salt/acid]

Where salt represents the molarity of salt (sodium lactate), while acid is the molarity of acid (lactic acid). 

Moles of salt = 1 mol/L * 25 mL * 1 L/1000 mL = 0.025 moles salt
Moles of acid = 1 mol/L* 60 mL * 1 L/1000 mL = 0.06 moles acid
Total Volume = (25 mL + 60 mL)*(1 L/1000 mL) = 0.085 L

Molarity of salt = 0.025 mol/0.085 L = 0.29412 M
Molarity of acid = 0.06 mol/0.085 L = 0.70588 M

Thus,
pH = 3.86 + log(0.29412/0.70588)
pH = 3.48
You might be interested in
In many cases, a negatively charged compound (ex Cl-) will interact with a positively charged metal (ex Fe2 ). Usually we would
Zina [86]

Answer:

See Explanation

Explanation:

An ionic bond occurs due to electrostatic attraction between a positively charged ion and a negatively charged ion.

A metal and a ligand are bound by a coordinate covalent bond or a dative bond. This bond occurs due to donation of electron pairs from ligands to available orbitals on metals.

The formation of coordinate bonds is evident when neutral molecules or negative ions with non bonding electrons donate same to empty metal orbitals. This is sometimes shown by an arrow pointing from the ligands to the metal center.

For instance; tetraammine copper II ion is formed when four ammonia molecules donate a lone pair each to available vacant orbitals of the copper metal center to form [Cu(NH3)4]^2+.

6 0
2 years ago
For the reaction 2 Cr(s) + 3 Pb²⁺(aq) ⟶ 3 Pb(s) + 2 Cr³⁺(aq), what is the value of n in the Nernst equation?
Blizzard [7]

Answer:

x

Explanation:

xx

5 0
3 years ago
Help?
tino4ka555 [31]

Answer:

There is 52.33 grams of water produced.

Explanation:

Step 1: Data given

Mass of propane burned = 32.00 grams

Molar mass of propane = 44.1 g/mol

Oxygen is in excess

Molar mass of water = 18.02 g/mol

Step 2: The balanced equation

C3H8 + 5O2 → 4H2O + 3CO2

Step 3: Calculate moles of propane

Moles of propane = mass propane / molar mass of propane

Moles of propane = 32.00 grams / 44.1 g/mol

Moles of propane = 0.726 moles

Step 4: Calculate moles of H2O

Propane is the limiting reactant.

For 1 mol of propane consumed, we need 5 moles of O2 to produce 4 moles of H2O and 3 moles of CO2

For 0.726 moles of propane we'll have 4*0.726 = 2.904 moles of H2O

Step 5: Calculate mass of H2O

Mass of H2O = moles of H2O * molar mass of H2O

Mass of H2O = 2.904 moles * 18.02 g/mol

Mass of H2O = 52.33 grams

There is 52.33 grams of water produced.

3 0
3 years ago
Add 3 x 10^9 +5.3 x 10^10
Ghella [55]
<span>Add 3 x 10^9 +5.3 x 10^10

</span><span>   3 x 10^9
 +5.3 x 10^10
</span>------------------
5.6 x 10^10
8 0
3 years ago
Read 2 more answers
An inference is a prediction based on prior knowledge or experiences.<br>O<br>True<br>Or<br>False​
goldenfox [79]

Answer:

True

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • 23g of sodium reacted with 35.5g of chlorine. Calculate the mass of the sodium chloride compound formed.
    6·2 answers
  • Use the formula: PV=nRT<br><br> If P=12, V=22.4, R=.0821 and T=100, then what would n=?
    8·1 answer
  • Which of the following shows a correct base pairing in DNA
    15·1 answer
  • A small container is filled with liquid water. What can happen if the container of water is an open system that couldn’t happen
    6·2 answers
  • A teenager is discovered in his bedroom by his mother when she comes in to wake him for school at 6 a.m. He is stiff and lividit
    14·1 answer
  • Answer in detail?? What precautions would you take to protect yourself from an earthquake, when you are at home and when you are
    5·2 answers
  • This is crazy. What’s 2+2?
    9·1 answer
  • Pls answer Which element in each pair has the higher electronegativity value? Explain your answer
    11·1 answer
  • 40.0 g of ice cubes at 0.0°C are combined with 150. g of liquid water at 20.0°C in a coffee cup calorimeter. Calculate the final
    7·1 answer
  • When using ion-selective electrodes, to compensate for a complex or unknown matrix, the _____________ method can be used to dete
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!