Answer:
pH at equivalence point is 8.52
Explanation:
1 mol of HCOOH reacts with 1 mol of NaOH to produce 1 mol of
So, moles of NaOH used to reach equivalence point equal to number of moles produced at equivalence point.
As density of water is 1g/mL, therefore molarity is equal to molality of an aqueous solution.
So, moles of produced =
Total volume of solution at equivalence point = (25+29.80) mL = 54.80 mL
So, at equivalence point concentration of =
At equivalence point, pH depends upon hydrolysis of . So, we have to construct an ICE table.
I: 0.1940 0 0
C: -x +x +x
E: 0.1940-x x x
So,
species inside third bracket represent equilibrium concentrations
So,
or,
So,
So,
So,
There should be a sufficient amount of the selected isotope in the rock.
The half-life of the isotope must be long enough to capture the age of the rock.
Explanation:
Sully must consider two main aspect before selecting her choice isotope for dating.
There must be sufficient amount of the selected isotope in the rock.
The half - life of the isotope must be long enough to capture the age of the rock.
- Radiometric dating gives a rock an absolute numerical age.
- The half-life of an isotope is time take for half of a radioactive element to decay.
- If the half-life of an isotope is very short, all the parent nuclide would have turned to daughter nuclides.
- Also, we must have sufficient amount of both the daughter and parent isotope in the selected rock.
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By calculating it's number of GROUP........
The formula for molarity is: mol/L. so it would be 2.0 mol/ 6.0 L.
the answer is: .33 M
hope this helps!