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This quiz focuses on Enduring Understanding: "Chemical changes are represented by a balanced chemical equation that identifies the ratios with which reactants react and products form."
In the reaction
2 NaCl (aq)+ Pb(NO3)2 (aq) → PbCl2(s) + 2 NaNO3(aq)
which are the spectator ions?
Na+ only
Na+ and NO3-
Pb2+ and Cl-
There are no spectator ions in this reaction.
Which ion would not form a precipitate if added to a solution of (NH4)2CrO4?
Ba2+
Pb+
Li+
Ag+
Consider the following, unbalanced chemical equation
KCl (aq)+ Pb(NO3)2 (aq)→ PbCl2(s) + KNO3(aq)
If one mole of lead nitrate is mixed with three moles of potassium chloride in solution, what remains in the solution when the reaction is complete?
2 mol KCl and 1 mol KNO3
0.5 mol Pb(NO3)2 and 3 mol KNO3
3 mol KNO3
1 mol KNO3
An element, M, can exist as both MCl2 and MCl4. When 17.7 g of MCl2 reacts completely with excess chlorine, 24.8 g of MCl4 is produced. What element is M?
Ti
Pd
Pt
S
How many moles of excess acid remain when 90 mL of 1.0M hydrochloric acid reacts with 40.0 mL of 0.50M barium hydroxide?
1.050 mol
0.874 mol
0.050 mol
0.250 mol
Consider the following, unbalanced equation:
Li(s) + H2O(l) → H2(g) + LiOH(aq)
What volume of hydrogen will be produced if 69.4 g Li reacts with excess water at STP?
112 L
22.4L
11.2L
222L
What is the name of the precipitate formed in the reaction of calcium sulfide and aluminum nitrate?
Calcium nitrate
Aluminum nitrate
Aluminum sulfide
No ppt is formed.
_________________ are the elements and compounds that enter into a chemical reaction.
Products
Reactants
Polymers
Bond
