To
determine the pH of a solution which has 0.06 m in sodium benzoate (nac7h5o2) and 0.09 m in benzoic acid (hc7h5o2), we use the ICE table and the acid dissociation constant of hc7h5o2 to determine the
concentration of the hydrogen ion present at equilibrium. We do as
follows:
<span>
HC7H5O2 = H+ + C7H5O2-
</span>NaC7H5O2 = Na+ + C7H5O2<span>-
Therefore, the only source of hydrogen ion would be the acid.
We use the ICE table,
</span>HC7H5O2 H+ C7H5O2<span>-
I
0.09 0 0.06
C
-x
+x +x
------------------------------------------------------------------
E
0.09-x x
0.06+ x
Ka = </span>6.28x10^(-5)<span> = (0.06 + x) (x) / 0.09 -x
x = 9.40x10^-5 M = [H+]
pH = - log [H+]
pH = -log </span> 9.40x10^-5 M<span>
pH = 4.03<span>
Therefore, the pH of
the resulting solution would be 4.03.</span></span>
a light bulb is the example of chemical energy
Answer:
Im not sure what you mean but I hope what I wrote helps you!
The Law of Conservation of Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.
Explanation:
Answer:
<u>Mass concentration (g/L) </u><u><em>= 2.49g/L.</em></u>
Explanation:
No. of moles = 
= 
= 0.001245 moles
Concentration of KHP (C1) in litres = n/v
= 
= 0.062 mol/L
We know that:
= 
where c1v1 and c2v2 are the products of concentration and volumes of KHP and NaOH respectively.
Since mole ratio is 1 : 1.
1 mole of NaOH - 40g
0.001245 mole of NaOH = 40 × 0.001245 = 0.0498g
⇒0.0498g of NaOH was used during the titration
<u><em>∴Mass concentration (g/L) = 0.0498g ÷ 0.02L</em></u>
<u><em>= 2.49g/L.</em></u>
Heat is the most important thing in the melting point of rock. Rock, melts when put into<span> 572 degrees Fahrenheit and 1,292 degrees Fahrenheit. Different types of rock may melt at different temperature because in the difference of their material. HOPED THIS HELPS YOU :)</span>
