Messages
Proposals
Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.
Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support
HYDRATE PROBLEMS 1. A 15.67 g sample of a hydrate of magnesium carbonate was heated, without decomposing the
carbonate, to drive off the water. The mass was reduced to 7.58 g. What is the formula of the hydrate? 2. A hydrate of Na2CO3 has a mass of 4.31 g before heating. After heating, the mass of the anhydrous
compound is found to be 3.22 g. Determine the formula of the hydrate and then write out the name of the hydrate.
3. A 1.98 g sample of a cobalt(II) chloride hydrate is heated over a burner. When cooled, the mass of the
remaining dehydrated compound is found to be 1.55 g. 4. A 5.00 g sample of hydrated barium chloride, BaCl2 ∙ nH2O, is heated to drive off the water. After
heating, 4.26 g of anhydrous barium chloride, BaCl2, remains. What is the value of n in the hydrate's formula?
5. Given that the molar mass of Na2SO4 ∙ nH2O is 322.1 g/mol, calculate the value of n. 6. Anhydrous lithium perchlorate (4.78 g) was dissolved in water and recrystalized. Care was taken to
isolate all the lithium perchlorate as its hydrate. The mass of the hydrated salt obtained was 7.21 g. What hydrate is it?
7. A 20g sample of a hydrate of nickel sulfate (NiSO4) lost 9.63g of water when heated. Determine the
hydrate’s formula. 8. A hydrate containing copper, sulfur, oxygen, and water lost 9g upon heating. Originally the hydrate
had weighed 25g. Analysis of the anhydrous substance revealed that the 6.4g of Cu, 3.2g of S, and 6.4g of O were present. Find the formula of the hydrate.
9. A substance was found to have the following percentages by mass: 23% zinc; 11% sulfur; 22% oxygen; 44% water. What is the empirical formula?
10. A hydrate of magnesium sulfate has a mass of 13.52 g. This sample is heated until no water remains.
The MgSO4 anhydrate has a mass of 6.60 g. Find the formula and name of the hydrate. 11. A sample of copper (II) sulfate hydrate has a mass of 3.97 g. After heating, the CuSO4 that remains
has a mass of 2.54 g. Determine the correct formula and name of the hydrate. 12. When 5.00 g of FeCl3 ∙ xH2O are heated, 2.00 g of H2O are driven off. Find the chemical formula and
the name of the hydrate.
1
Name: _____________________ Date: ____________
13. A sample of the hydrate of sodium carbonate has a mass of 8.85 g. It loses 1.28 g when heated. Find the formula and the name of the hydrate.
14. A 16.4 g sample of hydrated calcium sulfate is heated until all the water is driven off. The calcium
sulfate that remains has a mass of 13.0 g. Find the formula and the chemical name of the hydrate. 15. When 8.00 g of Pb(C2H3O2)2 ∙ xH2O are heated, 1.14 g of H2O are driven off. Find the chemical
formula and the name of the hydrate.
Stoichiometry Test Review
1) How many grams of Cl in 0.0255 mol Cl? 2) How many atoms of silicon in 144.7 g of Si? 3) Which of the following contains the greatest number of atoms: 99.0g of tin or 4.45 moles of
strontium (show all work and circle your answer)? 4) Propane, the gas in your grill, burns in excess oxygen according to the following reaction:
C3H8 + 5O2 → 3CO2 + 4H2O How many moles of CO2 are formed from 3.85 mol of propane?
5) 14KMnO4 + 4C3H5(OH)3 → 7K2CO3 + 7Mn2O3 + 5CO2 + 16H2O
a. If 3.39 mol of potassium carbonate are produced via this balanced equation, how many grams of manganese (III) oxide are also produced?
b. How many grams of carbon dioxide will be produced from 50.0g of KMnO4? 6) Find the percent composition of lead (II) phosphate: Pb3(PO4)2 7) Determine the empirical formula of a hydrocarbon which is found to be 82.5% carbon and 17.5%
hydrogen by mass. 8) Determine the molecular formula of a compound consisting of 40.00% C, 6.71% H, and 53.29%O,
with a formula mass of 180.1854 u. 9) Analysis of an air pollutant indicates that the compound is 30.4% nitrogen and 69.6% oxygen. The
molar mass of the pollutant is 92.0g/mol. Determine the molecular formula and the name of the pollutant.
10) What mass of xenon are contained in a 2.75 L sample of xenon at STP? 11) How many liters would be occupied by a 17.6 g sample of fluorine at STP? 12) Octane, the hydrocarbon in gasoline, burns according to the following equation:
C8H18(g) + O2(g) → CO2(g) + H2O(g) (a) If 3.99 L of O2 react at STP, what volume of CO2 is produced? (b) How many moles of H2O are produced?
2
Name: _____________________ Date: ____________
(c) What mass of octane (C8H18) is required to react? 13) Find the empirical formula for the oxide that contains 42.05 g of nitrogen and 95.95 g of oxygen.
14) If 2.191 g of a hydrate of calcium chloride produces 1.110 g of anhydrous CaCl2, calculate the
chemical formula of the hydrate. 15) 0.865g of an unknown hydrate is heated until the mass remains constant. When the remainder is
massed it is found to be 0.566 g. The remaining salt is analyzed and found to be: Ca: 29.8%; S: 24.2%; O: 46.0%.
What is the simplest formula and name of the compound?
3
| Writer | Writer Name | Amount | Client Comments & Rating |
|---|---|---|---|
ONLINE |
Instant Homework Helper |
$36 |
She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up! |
Custom Original Solution And Get A+ Grades
Custom Original Solution And Get A+ Grades
Custom Original Solution And Get A+ Grades
| Writer | Writer Name | Offer | Chat |
|---|---|---|---|
ONLINE |
Maths MasterI am a PhD writer with 10 years of experience. I will be delivering high-quality, plagiarism-free work to you in the minimum amount of time. Waiting for your message. |
$25 | Chat With Writer |
ONLINE |
Isabella K.I am an elite class writer with more than 6 years of experience as an academic writer. I will provide you the 100 percent original and plagiarism-free content. |
$43 | Chat With Writer |
ONLINE |
Essay & Assignment HelpBeing a Ph.D. in the Business field, I have been doing academic writing for the past 7 years and have a good command over writing research papers, essay, dissertations and all kinds of academic writing and proofreading. |
$30 | Chat With Writer |
ONLINE |
Innovative WriterI have written research reports, assignments, thesis, research proposals, and dissertations for different level students and on different subjects. |
$48 | Chat With Writer |
ONLINE |
Accounting & Finance SpecialistI can assist you in plagiarism free writing as I have already done several related projects of writing. I have a master qualification with 5 years’ experience in; Essay Writing, Case Study Writing, Report Writing. |
$38 | Chat With Writer |
ONLINE |
Top Grade TutorI reckon that I can perfectly carry this project for you! I am a research writer and have been writing academic papers, business reports, plans, literature review, reports and others for the past 1 decade. |
$17 | Chat With Writer |
Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.