ch9 review
Review name______________________pd ____
bs lab
• Write the equation for the reaction in the baking soda lab. Include states.
Data: E dish =41.5g , e dish and bs =48.5g, e dish and salt =45.5g.
1. Find the theoretical yield of salt and %yield. Show work.
Give the common names for the substances.
2.What are the products?reactants? Limiting reactant? Excess reactant?
3.What was in the dish when the reaction was over, before putting it into the oven?
4.Which substance appeared as bubbles?
5.Which substance was removed by the oven?
6.Which substance was the residue after heating?
7.Was this reaction endo or exothermic? Why?
8. About what temperature is the room in celsius?
mgo lab
9. Write the equation for the reaction in the burning magnesium lab. Include states.
data: Crucible =12.3g, crucible and Mg =13.4g crucible and MgO = 13.8g.
10 use the mass of Mg to Find the theoretical yield of product and then calculate %yield. Show work.
11.What are the products?reactants? Limiting reactant? Excess reactant?
12.What was the white smoke?
13. Which substance had a molar mass of 24g?
14. In this reaction it appears matter is__
15. When wood burns, it appears matter is __
16. In chemical changes matter is always ____
17. Was this reaction endo or exothermic? Why?
18Classify this reaction as one of the 5 types.
19What is the molar mass of magnesium oxide?
stochiometry
20 Balance and classify KClO3 = KCl + O2
21How many moles of KCl are produced when 15 moles of potassium chlorate are decomposed?
22How many moles of oxygen are produced from the decomposition of 1 mole of potassium chlorate?
23How many moles of potassium chlorate are needed to make 12 moles of oxygen?
24How many moles of KCl are produced when 3 moles of oxygen are obtained?
25How many Liters of oxygen gas would be produced from 1 mole of potassium chlorate? (at STP)
26 How many Liters (at STP) of oxygen gas (O2) are produced from the decomposition of 25g of Potassium chlorate? show work with dimensional analysis
combustion & stochiometry
27What is the mass of 1 mole of C2H6?
28What is the volume of 1 mole of C2H6 at STP?
29What do the letters STP mean? Give the standard numbers and units.
30 Write a balanced chemical equation for the combustion of heptane - C7H16
What volume of carbon dioxide would be produced from burning 2 Liters of heptane gas?
31. What mass of carbon dioxide could be produced (theoretically) from the combustion of 25g of heptane? What is the % yield if the actual yield is 71g? Show work.
32What are the products?reactants?
33Which reactant is always present in combustion?
34Which is the fuel?
35What is always produced when hydrocarbons burn?
36What is the match or striker needed to start the reaction called?
37What is the mass of ½ mole of water?
38What is the volume of 14g of carbon monoxide gas at STP?
39What is the mass of 2 moles of carbon dioxide? How many molecules of CO2 are in 2 moles?
40What is the volume of 2 moles of carbon dioxide gas at STP?
rchem may stop here__________________________________
copy table on paper, fill in then answer on form
41 balance the equation, circle the limiting reactant, fill in the table.
42. on paper, do this and be prepared to check.
Write a balanced chemical equation for the combustion of C6H14.
40g of oxygen gas and 20 g of the C6H14 are mixed and ignited. What is the limiting reactant? How many grams of water are produced? How many grams of excess reactant remain? show work with dimensional analysis.