Chemical Reactions Practice Test multiple choice – please use capital letters.
_____1. Neon has an atomic number of 10 and calcium has an atomic number of
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Name:___________________________________
Period;)__________
Chemical Reactions Practice Test multiple choice – please use capital letters _____1. Neon has an atomic number of 10 and calcium has an atomic number of 20. Compared to a mole of neon, a mole of calcium has a) twice as many atoms b) the same number of atoms c) half the number of atoms _____2. What unit allows chemists to compare one chemical to another? a) amu b) kilograms c) atomic weights d) moles ______3. The coefficients from the balanced equation represent a) mole ratios b) masses c) molar masses _______4. In a chemical equation the symbol (aq) means a. b. c. d.
water dissolved in water an acid insoluble
_______5. The tendancy for a replacement reaction to occur increases as the a. b. c. d.
temperature increases valence electrons are used up interval between the two similar elements increases on the activity series interval between the two similar elements decreases on the activity series
_______6. The production of a slightly soluble solid compound in a double displacement reaction results in the formation of a a. b. c. d.
gas precipitate combustion reaction halogen
Name:___________________________________
Period;)__________
______7. The coefficients tin a chemical equation a. b. c. d.
indicate the number of moles that react show the number of g rams of each substance that react are the mo;lar masses of the substances that react show the valence electrons for each atom
______8. If metal X is lower than metal Y on the activity series, then a. b. c. d.
X will replace ions of Y in solution Y will replace ions of X in solution Y will form oxides only indirectly X will react with cold water
______9. To balance a chemical equation it is permissable to adjust the a. subscripts b. coefficients c. compound formulas d number of products PART 2
PART 3 *Use the activity series to predict whether or not the following will occur 1. Platinum + H2O (g) --------->
Yes
2. Calcium fluoride + chlorine ---->
Yes
No No
3. HCl + NaOH --------->
Yes
No
4. Cobalt + HNO3 ------->
Yes
No
5. Hg + O2 ------->
Yes
No
6. Mn + SrS ------->
Yes
No
7. Cu + AgNO3------->
Yes
No
_________________________________________________________________ PART 4 Integrating Skills FOR EACH PROBLEM: step #1* Predict products step #2* Use oxidation numbers to determine formulas step # 3* Write balanced equations step #4* Classify reaction type on the line provided 1. Lithium + Water ------->
__________
2. Zinc + Hydrochloric Acid ------->
__________
3. C2H2 + Oxygen ------>
__________
Name:___________________________________
Period;)__________
4 Calcium Chloride + Fluorine ----->
__________
5. Lithium iodide + iron ----->
__________
SHOW ALL WORK FOR CREDit ___ C2H6 + ___ O2 -----
+
1. If 3408 grams of C2H6 are reacted and 5301 grams of water are actually produced, what is the percent yield?
____Mg2Si + __H2O ------
+
2. If 36 grams of water and 57 grams of M2Si are reacted a) how many grams of Silcon hydride will be produced?
b) What is the limiting reactant? c) How many grams of the excess reactant will be leftover?
d) How many molecules of Mg(OH)2 will be produced?