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
Nina [5.8K]
3 years ago
15

A student was asked to prepare 500.0 mL of 6.0 M NaOH. The student measured 120.0 g of NaOH and placed it in a 1000 mL beaker. T

he student then added 500.0 mL of distilled water to the beaker and stirred until all of the NaOH had dissolved. The resulting solution is not 6.0 M. Is the concentration too high or too low? Explain and describe the proper technique for preparing this solution. 黑鬼
Chemistry
1 answer:
Morgarella [4.7K]3 years ago
7 0

Answer:

The concentration of the solution will be much lower than 6M

Explanation:

To prepare a solution of a solid, the appropriate mass is taken and accurately weighed in a weighing balance and then made up to mark with distilled water.

From

n= CV

n = number of moles m/M( m= mass of solid, M= molar mass of compound)

C= concentration of substance

V= volume of solution

m=120g

M= 40gmol-1

V=500ml

120/40= C×500/1000

C= 120/40× 1000/500

C=6M

This solution will not be exactly 6M if the student follows the procedure outlined in the question. The actual concentration will be much less than 6M.

This is because, solutions are prepared in a standard volumetric flask. Using a 1000ml beaker, the student must have added more water than the required 500ml thereby making the actual concentration of the solution less than the expected 6M.

You might be interested in
Which of the following would be the best representation of input energy and then
Rom4ik [11]
A is the correct answer
4 0
2 years ago
Calculate the theoretical yield of glycolysis and complete glucose breakdown
rusak2 [61]
Eukaryotic cells, the theoretical maximum yield of ATP generated per glucose is 36 to 38, depending on how the 2 NADH generated in the cytoplasm during glycolysis enter the mitochondria and whether the resulting yield is 2 or 3 ATP per NADH
6 0
3 years ago
In the reaction below how would adding more of product C affect the equilibrium of the system? A+B arrows both ways C+D
Shalnov [3]

Answer:

1. The reaction will proceed backward, shifting the equilibrium position to the left.

2. The reaction will proceed forward, shifting the equilibrium position to the right.

3. Either add more of the products ( H2O or Cl2) or remove the reactant (HCl or O2)

Explanation:

3 0
3 years ago
How many 20.0-g ice cubes are required to absorb 47.0 kJ from a glass of water upon melting?
Sati [7]

Hello!


The number of 20-g ice cubes required to absorb 47 kJ from a glass of water upon melting is 7 icecubes


Why?


We are going to clear from the equation of the released heat, the mass of ice (m). The specific latent heat of fusion of ice is 336 kJ/kg:


Q=m*L\\ \\ m=\frac{Q}{L}=\frac{47 kJ}{336 kJ/kg}=0,1399 kg=139,88 g\\   \\ 139,88g*\frac{1 icecube}{20g}=6,99=7icecubes


So, 7 ice cubes are required to absorb that amount of heat from the glass of water.


Have a nice day!

3 0
3 years ago
A lake in rural maine drops in ph from 7 to 5 as a result of acid rain falling into it. how has the h+ ion concentration change
Jlenok [28]
The H+ concentration in the lake has increased as a result of the acid rain.
The original pH of the lake was 7, which mean the water is neutral, but due to the acid rain, it drops to 5. This means, that the water has become acidic and how have more hydrogen ion. The H+ concentration in the lake has 100 times compares with its original pH.
3 0
3 years ago
Other questions:
  • What is the 10% rule? What is its significance? Why is energy lost?
    7·1 answer
  • 1) Which statement describes the relationship between thermal energy and particle movement?
    14·1 answer
  • A) Suggest one possible reason for the general trend indicated on the graph between 1910 and 2000.?
    15·2 answers
  • Components of crude oil can be separated through a process called _____.
    7·1 answer
  • Each of 7 students reported the number of movies they saw in the past year. Here is what they reported. 16,17,17,13,9,7,4 find t
    11·1 answer
  • How to Write Balanced Chemical Equations -<br> FeS + O2 - Fe,02 + SO2
    7·1 answer
  • Please help mehhhhhhhhhhhhhhhh
    8·1 answer
  • Write the correct balanced equation for
    14·1 answer
  • Finish the attachment quick it's due pleaseee
    7·1 answer
  • When do you use the roman numerals when naming ionic compounds
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!