Determine the effect the following errors would have on your determination of th

Question

Determine the effect the following errors would have on your determination of the percentages of the components in your mixture. In each case and for each component, indicate if the error would result in a determination of the substance that is too high, too low, or unchanged. Explain

Error: The residue from the filtration was not washed

i. Ammonium Chloride:

ii. Salt:

iii. Sand:

Error: The residue was washed with tap water instead of deionized water

i. Ammonium Chloride:

ii. Salt:

iii. Sand:

Error: Some of the mixture splattered out of the dish during the first heating.

i. Ammonium Chloride:

ii. Salt:

iii. Sand:

Explanation / Answer

Error: The residue from the filtration was not washed

i. Ammonium Chloride: Too high

ii. Salt: Too high

iii. Sand: Too high

If you filer sand and do not wash it, a lot of ammonium chloride and salt will remain in the sand.

Error: The residue was washed with tap water instead of deionized water

i. Ammonium Chloride: Too low

ii. Salt: Too low

iii. Sand: Too low

Tap water contains salt but in a very low quantity. There will be an error but will be minor

Error: Some of the mixture splattered out of the dish during the first heating.

i. Ammonium Chloride: unchanged

ii. Salt: unchanged

iii. Sand: unchanged

The percentages will remain unchanged because sand, ammonium chloride and salt aplattered together. Porcentage in an intensive quantity and not an extensive. It does not depends of the quantity of the sample.

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