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
neonofarm [45]
3 years ago
8

Assuming the final solution will be diluted to 1.00 l , how much more hcl should you add to achieve the desired ph?

Chemistry
1 answer:
solong [7]3 years ago
4 0
H = 2.7, therefore amount of H+ needed is 10^-2.7 M 

<span>u haf 80 ml of hcl and 90 ml of naoh left, therefore 20 ml of hcl used, and 10ml of naoh used. </span>

<span>mols of H+ = 0.02 x 7 x 10^-2 = 1.4 x 10^-3 </span>
<span>mols of OH- = 0.01 x 5 x 10^-2 = 5 x 10^-4 </span>

<span>H+ and OH- neutralise each other, so remaining mols of H+ = 9 x 10^-4 </span>

<span>u need 10^-2.7 mols of H+, so 10^-2.7 - 9 x 10^-4 = 0.001095 mol </span>

<span>vol of HCL needed = 0.001095 / 7 x 10^-2 = 0.0156 L = 15.6 mL</span>
You might be interested in
I have 345 mL of a 1.5 M NaCl solution. If I boil the water until the volume of the solution is 250 mL, what will the molarity o
likoan [24]
We know that molarity = mol/L, so:

1.5 M = x mol/0.345 L

1.5 M * 0.345 L = x mol => 0.5175 mol

0.5175 mol/0.250 L = 2.07 M

Your new molarity of the solution will be 2.07 M.
6 0
3 years ago
Which equation correctly relates the heat of reaction to the standard heats of formation?
VARVARA [1.3K]

Answer:

D

Explanation:

∆H° = ∆Hf ° (products) – ∆Hf ° (reactants)

4 0
3 years ago
What is back titration?​
Yakvenalex [24]

Answer:

Back titration is a titration done in reverse; instead of titrating the original sample, a known excess of standard reagent is added to the solution, and the excess is titrated.

I hope it's helpful!

3 0
2 years ago
The reaction where heat is added is called? removed?
Harrizon [31]
Endothermic<span> Reaction??? </span>
4 0
3 years ago
What parts of the earth include hydrosphere
Natasha2012 [34]

Answer: Hydrosphere, discontinuous layer of water at or near Earth's surface. It includes all liquid and frozen surface waters, groundwater held in soil and rock, and atmospheric water vapour. Earth's environmental spheresEarth's environment includes the atmosphere, the hydrosphere, the lithosphere, and the biosphere.

Explanation:

6 0
3 years ago
Other questions:
  • Sirius, the brightest star, is 8.8 light-years from Earth. That means
    10·1 answer
  • A rectangular field measures 6.0 m by 8.0 m. What is the area of the field in square centimeters (cm2)? Use the formula: Area =
    13·2 answers
  • What volume of 0.200 m hcl is required for the complete neutralization of 2.00 g of nahco3 (sodium bicarbonate)?
    14·1 answer
  • What are small round structures in the cell that breaks down large food particles into smaller ones
    13·2 answers
  • What is the frequency of a wave?
    11·2 answers
  • Amoebas live all their lives:​
    12·1 answer
  • Please comment if you are sure about your answer . Thank you
    5·1 answer
  • How does a sample of helium at 15 degree Celsius compare to a sample of helium at 215 K?
    12·2 answers
  • ................ is the organic molecule that is the main energy source for cell processes and is made with the energy released
    14·2 answers
  • Calculate how many grams would be required to prepare 600. 0 ml of 0. 150 m of naf? molar mass of naf is 41. 9 g/mo
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!