Answer: The molarity of
is 0.07 M
Explanation:
According to the neutralization law,
where,
= basicity
= 1
= molarity of
solution = ?
= volume of
solution = 25.0 ml
= acidity of
= 1
= molarity of
solution = 0.1000 M
= volume of
solution = 17.5 ml
Putting in the values we get:
Therefore, molarity of
is 0.07 M
Answer:
- The NaCl solution will have higher boiling point.
Explanation:
- C2H6O2 is a molecular substance. Meaning that when it dissolves it will remain this way:
C2H6O2 ---------> C6H12O6 (aq)
- Sodiumchloride (NaCl) is an ionic substance. Meaning that when it dissolves, it will create ions:
NaCl(s)-------> Na+(aq) + Cl- (aq)
Conclusion:
- NaCl is an ionic compound and C2H6O2 is a molecular compound. Ionic compounds have higher boiling points than molecular compounds. Therefore, NaCl will have the higher boiling point.
Answer:
65 g (C₂H₅)₂NH₂Br
Explanation:
It seems your question lacks the values required to solve the problem. However, an internet search tells me these are the values (if your values are different, keep those in mind when solving the problem, but the methodology remains the same):
" A chemistry graduate student is given 125 mL of a 0.90 M diethylamine ((C₂H₅)₂NH) solution. Diethylamine is a weak base with Kb=1.3×10⁻³. What mass of (C₂H₅)₂NH₂Br should the student dissolve in the (C₂H₅)₂NH solution to turn it into a buffer with pH=10.53? You may assume that the volume of the solution doesn't change the (C2H5)2NH2Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. "
To solve this problem we use the <em>Henderson-Hasselbach equation</em>:
- pH = pKa + log
We <u>calculate pKa from Kb</u>:
- Ka = Kw/Kb ⇒ Ka = 1x10⁻¹⁴/1.3×10⁻³ = 7.69x10⁻¹²
Now we possess all the required data to calculate the concentration of the bromide salt (C₂H₅)₂NH₂Br :
- pH = pKa + log
- 10.53 = 11.11 + log
![\frac{0.90M}{[Salt]}](https://tex.z-dn.net/?f=%5Cfrac%7B0.90M%7D%7B%5BSalt%5D%7D)
- -0.58 = log
![\frac{0.90M}{[Salt]}](https://tex.z-dn.net/?f=%5Cfrac%7B0.90M%7D%7B%5BSalt%5D%7D)
- 10⁻⁰°⁵⁸=
![\frac{0.90M}{[Salt]}](https://tex.z-dn.net/?f=%5Cfrac%7B0.90M%7D%7B%5BSalt%5D%7D)
Now we use the total volume to<u> calculate the moles of (C₂H₅)₂NH₂Br required to have that molar concentration</u>:
- 3.42 M * 0.125 L = 0.4275 mol (C₂H₅)₂NH₂Br
Finally we calculate <u>the mass of (C₂H₅)₂NH₂Br</u>:
- 0.4275 mol (C₂H₅)₂NH₂Br * 154.05 g/mol = 65.86 g
Which rounding to 2 significant figures is 65 g (C₂H₅)₂NH₂Br
Answer:
H +
Explanation:
Acid are those species which donates the H+ ion when dissolved in a solution. In other way acid are those chemical species which donate proton to other species as proton means H+ ion so H+ ions are formed as a result of dissolution ..
To analyze. Oml they won't let me add it unless I write more. Smh.