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Identify the parts of the distillation apparatus and explain the function of the thermometer. Calculate the relative atomic mass of potassium (K) given the isotopic masses and abundances.

Chemistry

ScanSolve AI Answer

Answer

2

10.81\text{10.81}

Step-by-step solution

5 steps

Part 1

Part a

A: Thermometer
B: Liebig condenser

Part b

The function of part A (thermometer) is to measure the temperature of the vapor to ensure that the liquid being collected is pure and boiling at its characteristic boiling point.

Part 2

10.81\text{10.81}

  1. Convert the percentage abundances to fractional abundances.

    For 10K^{10}\text{K}: 18.69%=0.186918.69\% = 0.1869
    For 11K^{11}\text{K}: 81.28%=0.812881.28\% = 0.8128

  2. Calculate the relative atomic mass using the formula

    Relative Atomic Mass=∑(Isotopic Mass×Fractional Abundance)\text{Relative Atomic Mass} = \sum (\text{Isotopic Mass} \times \text{Fractional Abundance}) Relative Atomic Mass of K=(10×0.1869)+(11×0.8128)\text{Relative Atomic Mass of K} = (10 \times 0.1869) + (11 \times 0.8128)

  3. Perform the multiplication.

    10×0.1869=1.86910 \times 0.1869 = 1.869 11×0.8128=8.940811 \times 0.8128 = 8.9408

  4. Add the results to find the relative atomic mass.

    Relative Atomic Mass of K=1.869+8.9408=10.8098\text{Relative Atomic Mass of K} = 1.869 + 8.9408 = 10.8098

  5. Round the answer to an appropriate number of significant figures.

    Given the abundances are to two decimal places, we can round the final answer to two decimal places.

    Relative Atomic Mass of K≈10.81\text{Relative Atomic Mass of K} \approx 10.81

    The relative atomic mass of K is 10.81\boxed{\text{10.81}}.

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