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
Oduvanchick [21]
3 years ago
5

40.0 ml of an acetic acid of unknown concentration is titrated with 0.100 M NaOH. After 20.0 mL of the base solution has been ad

ded, the pH in the titration flask is 5.10. What was the concentration of the original acetic acid solution?(Ka(CH3COOH) = 1.8 × 10–5)
Chemistry
1 answer:
kirill115 [55]3 years ago
6 0

Answer:

0.5 M

Explanation:

We have to start with the <u>reaction</u> between NaOH and CH3COOH:

CH_3COOH~+~NaOH->CH_3COONa~+~H_2O

We will have a <u>1:1 ratio</u> between the acid and the base. The next step then would be the calculation of the <u>moles of NaOH</u> and his convertion to <u>moles of CH3COOH</u>.

20~mL~\frac{1~L}{1000~mL} ~=~0.02~L

mol~=~0.1~M*0.02~L=0.02~mol~NaOH

0.02~mol~NaOH~\frac{1~mol~CH_3COOH}{1~mol~NaOH}=~0.02~mol~CH_3COOH

The final step is the calculation of the <u>concentration of the acid</u>.

M=\frac{0.02~mol~CH_3COOH}{0.04~L}=~0.5~M

Due to the Ka value we can use the acetic acid as a <u>strong acid</u>.

You might be interested in
How to describe a ufo??​
erastova [34]

Answer:

Unidentified flying object or fly saucer.

Explanation:

6 0
3 years ago
Read 2 more answers
A lithium atom starts from rest at a position x = xo and falls toward zinc atom with an acceleration that depends on their separ
rusak2 [61]

Answer:

Please refer to the attachment for answers.

Explanation:

Please refer to the attachment for explanation

3 0
3 years ago
Is there a way to stop radioactive decay?
Wittaler [7]
The chain reaction is easy to stop. Just add a neuron absorbing material. The Control Rods in rectors can do that You just SCRAM (put the rods all the way in) or add something like Boron and the chain reaction stops. 

<span>The problem is the radioactive waste. Those isotopes break down and release heat spontaneously, no neutrons required. The only known way to stop or slow radioactive decay down is to slow time down by moving at relativistic speed or near orbit to a black hole.</span>
4 0
3 years ago
In the Periodic Table, what is the relationship between two elements that are placed side-by-side in a row?
marusya05 [52]
Answer is D. The periodic table rows are arranged by increasing atomic number. The atomic number is decided by how many protons they have.
5 0
4 years ago
20 points please help
exis [7]

The answer should be A, flammability.


The isotopes of the same element would result in the same chemical properties, as the number of protons and electrons are not changed, meanwhile, the physical properties would be slightly different with each other because they have different numbers of electrons.


Out of the 4 options, only option A is a chemical property. Chemical properties are the properties of an element reacting with other substances that creates new substances at the end. While physical properties are the ones that does not produces new substances or any reactions. They are usually observable and measurable.


Therefore, since flammability is a chemical property, the answer is A.

6 0
3 years ago
Other questions:
  • Barium has a density of 3.59 g/cm
    7·1 answer
  • How many grams of nacl are required to make 500.0 ml of a 1.500 m solution?
    13·2 answers
  • A solution of ethanol (c2h5oh) in water is prepared by dissolving 75.0 ml of ethanol (density 0.79 g/cm3 ) in enough water to ma
    14·1 answer
  • Please help solving number 48.
    10·1 answer
  • The solubility of glucose at 30°C is
    11·1 answer
  • Weather stations send up weather balloons with _____ to transmit temperature, humidity, wind speed, and wind direction measureme
    14·1 answer
  • Draw the lewis structure for the polyatomic trisulfide s−23 anion. be sure to include all resonance structures that satisfy the
    9·1 answer
  • How many molecules in 400g of acetic acid
    9·1 answer
  • A student reads that sodium atoms (Na) react with chlorine (Cl2) molecules to form the compound sodium chloride (NaCl). Which mo
    7·2 answers
  • The heat of combustion for sugar is 5639 kJ/mole, but that for TNT is 3406 kJ/mole. Why, if the heat of combustion for TNT is sm
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!