Answer:
B. <u><em>At the end of the reaction, both product and reactants are of a constant concentration.</em></u>
Explanation:
- Option A and C are similar as they both refer to constant concentration of product and reactant respectively in first half. As in the graph, the concentration of reactant and product changes (concentration of reactant decreases and concentration of product increase) with time in the <em>first half</em> of the reaction. This made both A and C option wrong.
- Option D is also wrong as at the <em>end of reaction</em> the line of concentration of product and reactant do not coincide which means they are not equal.
- Option B is correct as we take the end of reaction at the point where the concentration of reactant and product won't change much or become constant
<u><em>first half</em></u> time is the when concentration of reactant reduces to 50% of initial concentration which you can nearly assume on or before the point of intersection of both the concentration graphs.
<u><em>end of reaction</em></u><em> </em>is the time when the reaction completes which is theoretically infinite but generally we take end of the reaction as the time when the slope of concentration curve becomes nearly zero or the time when change in concentration of reactant and product is negligible.
0.109 miles of lithium is equal to 0.7565689 grams
Answer:
C
Explanation:
Since the solution have an observable color, that means that it absorbs light in the visible region hence it can be determined by colorimetry. Secondly, KMnO4 is a reducing agent which can be titrated against an oxidizing agent and it's concentration accurately determined.
Answer: Quantity required for a 0.125 mg dose is 2.5 ml
Explanation:
Given : Available concentration of Digoxin Elixir = 0.05 mg/ml.
That is 0.05 mg is present in 1 ml of the solution. We need to find quantity required for a 0.125 mg dose.
This can be found using unitary method.
For 0.05 mg, the quantity required is = 1ml
Thus for 1 mg , the quantity required is =
For 0.125 mg , the quantity required is =
Thus quantity required for a 0.125 mg dose is 2.5 ml