Answer:
pKa of the acid is 3.6
Explanation:
When a weak acid, HX, reacts with NaOH, the conjugate base, X⁻, is produced:
HX + NaOH → X⁻ + Na⁺ + H₂O
At the half neutralized solution, [HX] = [X-]
Based on Henderson-Hasselbalch equation:
pH = pKa + log [ X⁻] / [HX]
<em>Where pH is the pH of the buffer = 3.6</em>
<em>pKa is the pka of the solution</em>
<em>And as [ X⁻] = [HX], [ X⁻] / [HX] = 1</em>
<em />
Replacing:
3.6 = pKa + log 1
3.6 = pKa + 0
<h3>pKa of the acid is 3.6</h3>
<em />
<em />
Complete Question
The complete question is shown on the first uploaded image
Answer:
The pressure is ![P = 0.76 \ atm](https://tex.z-dn.net/?f=P%20%20%3D%200.76%20%5C%20atm)
Explanation:
From the question we are told that
The mass of the carbon monoxide is ![m_c = 17 \ g](https://tex.z-dn.net/?f=m_c%20%20%3D%20%2017%20%5C%20g)
The temperature at which takes place ![T = 30 .0^oC = 30 + 273 = 303 K](https://tex.z-dn.net/?f=T%20%20%3D%2030%20.0%5EoC%20%3D%20%2030%20%2B%20273%20%3D%20%20303%20K)
The volume of the sealed vessel is ![V = 20 .0L](https://tex.z-dn.net/?f=V%20%20%3D%20%2020%20.0L)
Generally the ideal gas law is mathematically represented as
![PV = nRT](https://tex.z-dn.net/?f=PV%20%20%3D%20%20nRT)
Where R is the gas constant with value ![R = 0.0821 \ L \ atm \ mol^{-1} K^{-1}](https://tex.z-dn.net/?f=R%20%3D%20%200.0821%20%20%5C%20L%20%5C%20atm%20%5C%20mol%5E%7B-1%7D%20K%5E%7B-1%7D)
n is the number of moles of carbon monoxide which is mathematically evaluated as
![n = \frac{m_c}{M_c}](https://tex.z-dn.net/?f=n%20%3D%20%20%5Cfrac%7Bm_c%7D%7BM_c%7D)
where
is the molar mass of carbon monoxide which is a constant with value
![M_c = 28 \ g/mol](https://tex.z-dn.net/?f=M_c%20%20%3D%20%2028%20%5C%20g%2Fmol)
So ![n = \frac{17}{28}](https://tex.z-dn.net/?f=n%20%20%3D%20%20%5Cfrac%7B17%7D%7B28%7D)
![n =0.6071](https://tex.z-dn.net/?f=n%20%20%3D0.6071)
Now Making P the subject we have
![P =\frac{ 0.6071 * 0.0821 * 303}{20}](https://tex.z-dn.net/?f=P%20%20%3D%5Cfrac%7B%200.6071%20%2A%200.0821%20%2A%20303%7D%7B20%7D)
![P = 0.76 \ atm](https://tex.z-dn.net/?f=P%20%20%3D%200.76%20%5C%20atm)
The balanced chemical reaction is:
C6H6 + 9/2O2 = 6CO + 3H2O
We are given the amount of benzene to be used for the reaction. This will be the starting point for the calculations.
23.1 g C6H6 ( 1 mol C6H6 / 78.12 g C6H6 ) ( 6 mol CO / 1 mol C6H6 ) = 1.77 mol CO is produced from the reaction
Answer:
nop
Explanation:
porqUE todo sería un desastre
Answer:
The first seven metals in the periodic table are lithium, beryllium, sodium, magnesium, aluminium, potassium and calcium, known collectively as the “lightest metals”
Explanation:
<h2><u>CHECK THE OPTIONS AND ANSWER ANY ONE IF SINGE CHOICE..</u></h2>