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
shusha [124]
3 years ago
14

A student prepares a standardized solution of sodium hydroxide by the procedure outlined. The student first prepares a saturated

solution of sodium hydroxide using freshly distilled or deionized water. She measures about 5 mL of the saturated solution with a graduated cylinder and dilutes to 1 L in a plastic bottle with freshly distilled or deionized water to make a solution that is about 0.1 M. To determine the exact concentration, she puts the NaOH solution in a buret and titrates a carefully-weighed pre-dried solid acid of known molar mass. She records the volume of NaOH needed to neutralize it and repeats the process several times to determine the concentration of the NaOH solution. She calculates the concentration and uncertainty in the concentration of the NaOH from the titration data.
Chemistry
1 answer:
skad [1K]3 years ago
8 0

NaOH has the property of deliquescent hence it cannot be weighed directly instead a saturated solution is diluted and desired concentration is obtained.

Explanation:

Sodium hydroxide undergoes deliquescent.

Deliquescence is the process in which substance absorbs moisture and carbon dioxide from the atmosphere to the extent of getting dissolved and form a solution.

Deliquescence happens when vapour pressure of solution formed is less than the partial pressure of water vapour in the air.

This is the reason that student did not measure the sodium hydroxide directly as the weight will change and proper solution cannot be made. Because of the deliquescence standard solution of NaOH is not prepared.

The student made a solution without weighing the NaOH instead she prepared a solution till the NaOH got dissolved and then diluted the solution.

You might be interested in
How do electrons move between atoms to create electricity?
PilotLPTM [1.2K]
<span>The electrons get energy by the potential</span><span> force when we apply potential difference to a conductor moving from low to high therefore, the electrons move one to another creating electricity.</span>
4 0
3 years ago
Read 2 more answers
Why is it important to pasteurize certain liquids?
galben [10]

Answer:

Pasteurization involves heating liquids at high temperatures for short amounts of time, it can make it better if you wanted hot cocoa but bad for milk

Explanation:

4 0
3 years ago
Read 2 more answers
Can someone please help me?
irina [24]
Answer:
your answer is hawks
3 0
2 years ago
Read 2 more answers
A science fair volcano bubbles and fizzes. what is taking place?
vaieri [72.5K]
Answer is B. gas formation
7 0
3 years ago
part of the SO2 that is introduced into the atmosphere by combustion of sulfur containing compounds ends up being converted to s
alisha [4.7K]

Answer:

5 mol.

Explanation:

Equation of the reaction

2SO2 + 2H2O + O2 --> 2H2SO4

By stoichiometry, 2 moles of SO2 reacted with 2 moles of water and 1 mole of O2 to give 2 mole of sulphuric acid.

Number of moles:

5.0 mol SO2

4.0 mol O2

20.0 mol H2O

Calculating the limiting reagent,

5 mol of SO2 * 1 mol of O2/2 mol of SO2

= 2.5 mol of O2(4 mol of O2 is present)

5 mol of SO2 * 2 mol of H2O/2 mol of SO2

= 5 mol of H2O(20 mol of H2O)

SO2 is the limiting reagent.

Therefore, number of moles of H2SO4 = 5 mol of SO2 * 2 mol of H2SO4/2 mol of SO2

= 5 mol of H2SO4.

5 0
3 years ago
Other questions:
  • Q5-P1 is 1.00atm and V1 is 3.00L. We've now changed the volume so P2 is 0.700atm. Use Boyle's Law, how much is V2? *Round your a
    13·2 answers
  • The pressure the gas exert the walls of the container will decrease because the gas particles hit the wall of the container
    6·1 answer
  • 2Ag + H2S ➞ Ag2S + H2
    6·2 answers
  • How many oxygen atoms<br> in 4 Al 2 O 3
    13·1 answer
  • Which of the following conditions remain constant in Gay-Lussac's law? Temperature and number of moles Volume and number of mole
    13·2 answers
  • Which of the following is a synthesis reaction?
    11·1 answer
  • A) How many grams of Cu(OH)2will precipitate when excess NaOH solution is added to 42.0mL of 0.641 M CuI2 solution?
    8·1 answer
  • 1.
    5·2 answers
  • C + 2ZnO → CO2 + 2zn
    15·1 answer
  • How many atoms are in 76.15 grams of fe<br><br> urgently needed, will mark brainliest
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!