ima say A because- the amount of reactants and product do not change is always true for a chemical reaction that has reached equilibrium. Chemical reaction at equilibrium occurs when reactants and products are present in a concentration and have no further tendency to change with time.
Once I told a chemistry joke
I got no reaction.
What do you do with a sick chemistry teacher?
If you can't helium, and can't curium, you might as well barium.
I don't trust atoms,
I heard they make up everything
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Because the medal rod is a conductor and will electricity goes straight through it and will hit you with lightning
Answer:
<em>a. </em>The buffering range is between 2.74 and 4.74.
<em>b.</em> The ratio of the formate to the formic acid is 10.23.
Explanation:
<em>a.</em> For every buffer solution, the optimal effective range is pH = pKa ± 1. Outside this range, the buffer does not work properly.
For the formic acid, the pKa is 3.74, thus the optimal range is between 2.74 and 4.74.
<em>b. </em>The Henderson-Hasselbalch equation is a chemical expression used to calculate the pH of a buffer knowing the ratio of the acid to base, or to calculate the ratio knowing the pH. The expression is:
where [A^{-}] is the concentration of the conjugate base and [HA] is the concentration of the acid.
For a formic acid/potassium formate solution that has a pH of 4.75 and pka of 3.74: