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
Marta_Voda [28]
3 years ago
5

Heather is doing an acid-base reaction. She has 25.00 mL of hydrochloric acid of unknown concentration in a flask. She wants to

add a basic solution to the acid drop by drop, until all the acid has reacted. Which tool would be best for adding the basic solution dropwise and for most precisely measuring the volume of solution added?
Chemistry
2 answers:
yarga [219]3 years ago
4 0

Answer:

Burette.

Explanation:

The addition of base to an acid is generally done during titration.

To add base into acid precisely, we need burette clamped into burette stand.

The general capacity of burette is 50mL, and the least count is 0.1 mL.

The acid should be taken in conical flask.

The acid can be poured into the flask with the help of pipette fitted with a pump.

inna [77]3 years ago
3 0

Answer:

Heather has to do a titration with the acid-base reaction. She would need a complete buret assembly that contains, a buret, a buret clamp and a ringstand. She would also need an erlenmeyer flask and of course, a volumetric pipet with its pipet bulb.

Explanation:

You might be interested in
A chemist titrates of a hypochlorous acid solution with solution at . Calculate the pH at equivalence. The of hypochlorous acid
const2013 [10]

The question is incomplete, here is the complete question:

A chemist titrates 110.0 mL of a 0.2412 M hypochlorous acid (HCIO) solution with 0.0613 M NaOH solution at 25°C. Calculate the pH at equivalence. The pKa of hypochlorous acid is 7.50. Round your answer to 2 decimal places

<u>Answer:</u> The pH of the solution is 10.09

<u>Explanation:</u>

To calculate the volume of base, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is HClO

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is NaOH.

We are given:

n_1=1\\M_1=0.2412M\\V_1=110.0mL\\n_2=1\\M_2=0.0613M\\V_2=?mL

Putting values in above equation, we get:

1\times 0.2412\times 110.0=1\times 0.0613\times V_2\\\\V_2=\frac{1\times 0.2412\times 110.0}{1\times 0.0613}=432.8mL

At equivalence, the number of moles of acid is equal to the number of moles of base. Also, the moles of salt which is NaClO will also be the same.

To calculate the number of moles for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}     .....(1)

  • <u>For HClO:</u>

Molarity of HClO solution = 0.2412 M

Volume of solution = 110.0 mL

Putting values in equation 1, we get:

0.2412M=\frac{\text{Moles of HClO}\times 1000}{110}\\\\\text{Moles of HClO}=\frac{(0.2412\times 110)}{1000}=0.026532mol

  • <u>For NaClO:</u>

Moles of NaClO = 0.026532 moles

Volume of solution = [432.8 + 110] mL = 542.8 mL

Putting values in above equation, we get:

\text{Molarity of NaClO}=\frac{0.026532\times 1000}{542.8}=0.0489M

To calculate the pH of the solution, we use the equation:

pH=7+\frac{1}{2}[pK_a+\log C]

where,

pK_a = negative logarithm of weak acid which is hypochlorous acid = 7.50

C = concentration of the salt = 0.0489 M

Putting values in above equation, we get:

pH=7+\frac{1}{2}[7.50+\log (0.0489)]\\\\pH=7+3.09=10.09

Hence, the pH of the solution is 10.09

4 0
3 years ago
Which is an example of the strong force in action?
yarga [219]

I would say that it would probably be: The Sun pulls on Earth as Earth moves around the sun.

Sorry if I'm wrong <3

3 0
3 years ago
Read 2 more answers
A habit is: <br>pls help me ty​
kherson [118]
What class is this? (Subject)
4 0
3 years ago
Read 2 more answers
Aluminium and potassium nitrate will not react when mixed together?
Stels [109]

Answer:

they would react to make aluminum oxide and nitrogen

Explanation:

hope this helps plz mark as brainliest

7 0
3 years ago
Read 2 more answers
How many minutes are in 9,040 ms
aivan3 [116]

Answer:

0.15066667

I tried, hope this helps :)

7 0
3 years ago
Other questions:
  • A piece of balsa wood has a mass of 15.196 g and a volume of 0.1266 L. What is the density in g/mL?
    10·1 answer
  • Which of the following elements are characterized by having full outermost s and p
    15·1 answer
  • All atoms of the same element have the same
    9·1 answer
  • Convert the average temperatures for each collected data point given below from °C to K. Plot the average cell potentials E (y-a
    7·1 answer
  • What is the pH of a 0.1 M phosphate buffer (pKa = 6.86) that contains equal amounts of acid and conjugate base?
    5·1 answer
  • PLZ HELP!!!!!!how many atoms are in 6.8 miles of sulfur
    10·1 answer
  • ATP is a ____________ composed of a nitrogen-containing base, adenine, and a 5-carbon sugar ribose (together called adenosine),
    15·2 answers
  • What volume (in mLmL) of a 0.175 MHNO3MHNO3 solution is required to completely react with 44.2 mLmL of a 0.108 MNa2CO3MNa2CO3 so
    5·1 answer
  • Right answer gets brainlist
    12·2 answers
  • Apakah setengah persamaan pengoksidaan,setengah persamaan penurunan dan persamaan ion keseluruhan bagi larutan kuprum(II)nitrat+
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!