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A student determines that a anhydrous salt to water ratio is 1:6.913. The currect formula is salt.7H2O.

What is the percentage error?

What is the physical meaning of the negetive sign in the answer?

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Lelia Lubowitz
Lelia LubowitzLv2
28 Sep 2019

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Related questions

These are questions on the pre-lab of Synthesis and Analysis of Alum Crystals.

1. A student conducts an experiment on a different hydrate. The empty crucible is heated to a constant mass of 24.330. A sample of the unidentified hydrate is placed in the crucible, and the total mass is 31.571 g. The crucible and hydrate are heated to constant mass, which is measured at 29.002 g. The molar mass of the anhydrous salt is 159.609 g.

a. Calculate the formula of this hydrate. Note that in the formula of a hydrate, salt•xH2O, the coefficient “x” must be a whole number.

b. Give a reason your calculated value of “x” is less than the whole number to which you rounded.

2. A student dehydrates a sample of magnesium sulfate heptahydrate. The anhydrous salt to water ratio is 1:6.913. The correct formula is salt•7H2O.

a. Calculate the student’s percent error.

b. What is the physical meaning of the negative sign in the answer?

Please help with any step by step explainations completley explained out - thank you

These are questions on the pre-lab of Synthesis and Analysis of Alum Crystals.

1. A student conducts an experiment on a different hydrate. The empty crucible is heated to a constant mass of 24.330. A sample of the unidentified hydrate is placed in the crucible, and the total mass is 31.571 g. The crucible and hydrate are heated to constant mass, which is measured at 29.002 g. The molar mass of the anhydrous salt is 159.609 g.

a. Calculate the formula of this hydrate. Note that in the formula of a hydrate, salt•xH2O, the coefficient “x” must be a whole number.

b. Give a reason your calculated value of “x” is less than the whole number to which you rounded.

2. A student dehydrates a sample of magnesium sulfate heptahydrate. The anhydrous salt to water ratio is 1:6.913. The correct formula is salt•7H2O.

a. Calculate the student’s percent error.

b. What is the physical meaning of the negative sign in the answer?

Please help with any step by step explainations completley explained out - thank you

These are questions on the pre-lab of Synthesis and Analysis of Alum Crystals.

1. A student conducts an experiment on a different hydrate. The empty crucible is heated to a constant mass of 24.330. A sample of the unidentified hydrate is placed in the crucible, and the total mass is 31.571 g. The crucible and hydrate are heated to constant mass, which is measured at 29.002 g. The molar mass of the anhydrous salt is 159.609 g. a. Calculate the formula of this hydrate. Note that in the formula of a hydrate, salt•xH2O, the coefficient “x” must be a whole number. b. Give a reason your calculated value of “x” is less than the whole number to which you rounded. 2. A student dehydrates a sample of magnesium sulfate heptahydrate. The anhydrous salt to water ratio is 1:6.913. The correct formula is salt•7H2O. a. Calculate the student’s percent error. b. What is the physical meaning of the negative sign in the answer?

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