The unknown metal sulfates are hygroscopic and will absorb water from air. The unknowns must thus be kept in desiccators to remove any absorbed water. How would your results be affected if your unknown sample was not desiccated? Would this error cause your calculation of the mass percent of sulfate in the unknown to be too high or too low? Explain.

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13-07-2022
Chemistry

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The unknown metal sulfates are hygroscopic and will absorb water from air. The unknowns must thus be kept in desiccators to remove any absorbed water. How would your results be affected if your unknown sample was not desiccated? Would this error cause your calculation of the mass percent of sulfate in the unknown to be too high or too low? Explain.

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aryanagarwal466 aryanagarwal466 · Answer 1 · 2022-07-16T06:13:19+02:00

The sample will be heavier since it will include water if it wasn't desiccated. Therefore, it would be either too high or too low when we calculated the mass percent of sulfate.

What would happen to our results if the unknown sample wasn't dried out?

The sample will be heavier since it will include water if it wasn't desiccated. Therefore, it would be either too high or too low when we calculated the mass percent of sulfate.

Water will increase the bulk of the compound when it is added. The compound as a whole will get heavier as a result. However, an element's or molecule's mass does not change.

Therefore, when the denominator rises while the numerator remains constant This implies that your share of the outcome will decline. Because the numerator remains constant while the denominator expands as a result of the water addition, your mass percent will be too low. Consequently, your mass percentage will be too low.

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