a student reported the following composition of an unknown mixture: 25% NH4Cl, 3

Question

a student reported the following composition of an unknown mixture: 25% NH4Cl, 30% NaCl, and 50% SiO2. Assuming the student's calculations are correct, explain the student error in this experiment a student reported the following composition of an unknown mixture: 25% NH4Cl, 30% NaCl, and 50% SiO2. Assuming the student's calculations are correct, explain the student error in this experiment a student reported the following composition of an unknown mixture: 25% NH4Cl, 30% NaCl, and 50% SiO2. Assuming the student's calculations are correct, explain the student error in this experiment

Explanation / Answer

given

25% of NH4Cl

30% of NaCl

50% of Si02

now

total percentage = 25 + 30 + 50

total percentage = 105

but

it cannot be more than 100

so there is an error in this experiment

the reason for the error may be

1) there may be mositure in the compounds and it is neglected during the measurement

in this case

mass of the compound = mass of water + actual mass of compound

as the mass of water is neglected

the actual mass of compound equals the mass of the compound

it is beacuse of this reason an error is occured

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