When making the sucrose solution in Part A you measure the correct amount of suc

Question

When making the sucrose solution in Part A you measure the correct amount of sucrose on the scale. However, some of the sucrose was spilled on the balance and not into the beaker. How will this error affect the calculated mass percent (will the resulting calculated mass percent be too high, too low or unaffected)?

Too high. Grams would be reported too high. As grams of sucrose increases, so does the mass percent of sucrose.

Too low. Since some of the sucrose is left on the balance, less mass is used in the solution. As grams of sucrose decreases, so does mass percent of sucrose.

Unaffected. The mass used in the calculation will not be affected that much, so density will remain unaffected.

which is correct?

Explanation / Answer

W% = mass of solute *100 / mass of solvent

The advantage of this type of concentration unit is that it depends only on the mass, which is accurately measured with an analytical balance. It is not dependent on the temperature.

So there will be no affect

Answer is

Unaffected. The mass used in the calculation will not be affected that much, so density will remain unaffected.

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