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
Maru [420]
2 years ago
10

A 25.00-ml sample of propionic acid, hc3h5o2, of unknown concentration was titrated with 0.141 m koh. the equivalence point was

reached when 37.48 ml of base had been added. what is the concentration of the propionate ion at the equivalence point?
a. 0.211 m
b. 0.147 m
c. 0.141 m
d. 0.0846 m
e. 0.128 m
Chemistry
1 answer:
Scorpion4ik [409]2 years ago
7 0
 The concentration of propionate ions   at  equivalent point is  0. 084 M
  calculation
write the equation for reaction
HC3H5O2   +  KOH  → H2O  + KC3H5O2

find the moles  of  KOH  used
moles=  molarity  × volume in liters
volume  in liters = 37.48 ml/1000 =0.03718L
molarity = 0.141 M


moles is therefore =  0.141 M  x0.03718 =  5.24238  x10^-3 moles

by use of mole  ratio between  KOH  and K3C3H5O2  which is 1:1  the  moles of K3C3H5O2  is also = 5.24238 x10^-3  moles

molarity is therefore = number  of moles/volume in liters
volume  in liters = 25/1000 +37.48/1000=0.06248 L

molarity of  propionate ions is therefore = (5.24238 x10^-3) / 0.06248 = 0.084  M
You might be interested in
in 4 season countries, the temperatire may drop till below 0°c during the peak of winter. why does the surface of the river or l
nikitadnepr [17]

Answer:

Explained below

Explanation:

Normally, when the temperature of water gets colder than 4° C, it starts expanding and will become less dense the colder it becomes. As the temperature gets closer to freezing point, the colder water will float to the top and the warmer water sinks to the bottom. This is mainly because of how the density of water behaves with falling temperatures.

Thus, the lake/river water will freeze from top to down as a a result of that phenomenon of colder water floating to the top and the warmer water sinking to the bottom.

4 0
3 years ago
Calculate the pH of each solution at 25∘C
JulijaS [17]

Answer: pH of HCl =5, HNO3 = 1,

NaOH = 9, KOH = 12

Explanation:

pH = -log [H+ ]

1. 1.0 x 10^-5 M HCl

pH = - log (1.0 x 10^-5)

= 5 - log 1 = 5

2. 0.1 M HNO3

pH = - log (1.0 x 10 ^ -1)

pH = 1 - log 1 = 1

3. 1.0 x 10^-5 NaOH

pOH = - log (1.0 x 10^-5)

pOH = 5 - log 1 = 5

pH + pOH = 14

Therefore , pH = 14 - 5 = 9

4. 0.01 M KOH

pOH = - log ( 1.0 x 10^ -2)

= 2 - log 1 = 2

pH + pOH = 14

Therefore, pH = 14 - 2 = 12

8 0
3 years ago
Pls help asap I’ll give brainliest
boyakko [2]

Answer:

2,1,2

......................

3 0
2 years ago
What is happening in the East African Rift Zone?
nadezda [96]

Plate is in the process of splitting into two tectonic plates

A) The techtonic plates are moving apart


7 0
2 years ago
Read 2 more answers
The electronegativity of the element affects all of the following except a- type of bond it forms with other elements b- the boi
seraphim [82]

The electronegativity of the element affects the ability of its compounds to dissolve in different solvents.

<h3>What is the meaning of electronegativity?</h3>

Electronegativity is a measure of an atom's ability to attract shared electrons to itself.

Polar bonds have a positive and negative side to them, and therefore can attract water dipoles and dissolve in water.

If the polarities of the solvent and solute match (both are polar or both are nonpolar), then the solute will probably dissolve.

If the polarities of the solvent and solute are different (one is polar, one is nonpolar), the solute probably won't dissolve.

Hence, option D is correct.

Learn more about  electronegativity here:

brainly.com/question/14560699

#SPJ1

6 0
2 years ago
Other questions:
  • over a 12.3 minuete period 5.13 E-3 moles of F2 gas effuses from a contaier. How many moles of CH4 gas could effuse from from th
    6·1 answer
  • How will adding NaCl affect the freezing point of a solution?
    6·1 answer
  • A certain substance X has a normal boiling point of 134.5°C and a molal boiling point elevation constant =Kb1.36·°C·kgmol−1 . Ca
    6·1 answer
  • An ionic bond would form between which pairs of elements? atomic number 4 and atomic number 18 atomic number 7 and atomic number
    10·1 answer
  • Which of the following can be the product of a neutralizationaction?
    9·2 answers
  • Help please!!!! What is the best description of the side of the moon that faces Earth?
    7·2 answers
  • Gallium (Ga) reacts with oxygen gas to form gallium oxide, Ga2O3. What would be the product formed when Indium (In) reacts with
    6·1 answer
  • How many atoms are in 15.6 grams of silicon?
    9·1 answer
  • Ionic equation for Anode positive electrode
    5·1 answer
  • Identify the correct equilibrium constant expression for this equation:
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!