All the graphs in this lab had what kind of shape? Cupric chloride hydrate has a
ID: 1020544 • Letter: A
Question
All the graphs in this lab had what kind of shape?
Cupric chloride hydrate has a formula weight of 170 grams per mole. What is the formula weight of the metal salt alone?
How many moles of water are attached to the metal salt in cupric chloride hydrate?
Find the theoretical ratio of mass between the anhydrous metal salt and the hydrate of cupric chloride.
Which of the following hydrates has the highest formula weight as the anhydrous salt?
The molecular mass of aluminum sulfate is 342 g/mol. You find through experimentation that the ratio of mass of dry salt to mass of hydrate is a ratio of close to 3/5. What is the percentage water by mass in the hydrate?
The molecular mass of anhydrous aluminum sulfate is 342 g/mol. The precise ratio of mass of anhydrous salt to hydrate is 61%. What is the approximate mole ratio of water to salt for aluminum sulfate hydrate?
The hydrates used in this lab all contain alkali metal salts.
All the graphs in this lab had what kind of shape?
curved lines positive sloped straight lines negative sloped straight lines random shapesExplanation / Answer
(1) Negative slope straight lines
(2) molar weight of Hydrated cupric chloride = 170
molar weight of anhydrous cupric chloride = 63.5 + 2 (35.5) = 134.5
(3) mass difference = 170 - 134 = 36
molar mass of each water molecule = 18
therefore number of water molecules = 36/18 = 2
(4) mass of anhydrous cupric chloride / mass of hydrated cupric chloride = 134/170 = 0.79
(5) All the given salts have dipositive metal ion.Hence number of chlorine atoms are two in all the salts. Therefore weigth of metal desides the salt having highest formula weight.
Among the given metals copper has high mass.So, Cupric chloride has highest formula weight among the given salts.
(6) 3*100/5 = 60 %
(7) 3:1
(8) False