Answer:
The NaCl concentration will be 0.03 M.
Explanation:
Given data:
Initial volume = V₁ = 56.98 mL (56.98/1000 = 0.05698 L)
Initial concentration = M₁= 0.5894 M
Final volume = V₂= 1.20 L
Final concentration = M₂= ?
Solution:
By diluting the solution volume of solution will increase while number of moles of solute remain the same.
Formula:
Initial concentration × Initial volume = Final concentration × Final volume
M₁V₁ = M₂V₂
M₂ = M₁V₁ / V₂
M₂ = 0.5894 M × 0.05698 L / 1.20 L
M₂ = 0.0336 M /1.20
M₂ = 0.03 M
Answer:
1.4
Explanation:
35 times .5 =25 times C. you have to get C by itself so you would have to do 35 times .5 and you get 17.5, than ÷ it by 25 and you get 1.4
Answer:
pH = 4,70
Explanation:
For bromocresol, as HX is yellow and X⁻ is blue, the indicator will be a perfect green color when HX = X⁻.
Using Henderson-Hasselbalch formula:
pH = pka + log [X⁻]/[HX] <em>(1)</em>
Where pka is -log ka = -log2,0x10⁻⁵ = 4,70
As HX = X⁻, [HX] / [X⁻] = 1
Replacing in (1):
pH = 4,70 + log 1
pH = 4,70 + 0
<em>pH = 4,70</em>
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I hope it helps!
Electrostatics is <span> a branch of physics that deals with the phenomena and properties of stationary or slow-moving electric charges. :) Hope this helps </span>
