chemistry help please!!!!?

O

oreo0madness

New member
1) Aqueous solutions of sodium sulfide and
copper(II) chloride are mixed together. Which
statement is correct?
a– Both NaCl and CuS will precipitate from
solution.
b– No precipitate will form.
c– Only CuS will precipitate from solution.
d– Only NaCl will precipitate from solution.


2) An aqueous solution of barium nitrate reacts with an
aqueous solution of sodium sulfate. Identify the solid
and indicate its coefficient in the balanced equation.
a– NaNO3; 1
b– BaSO4; 1
c– NaNO3; 2
d– BaSO4; 2
e– None of the above


3) You have separate aqueous solutions of NaOH and
Ca(OH)2 with the same concentrations. You wish to
neutralize an aqueous solution of HCl. Which basic
solution would require more volume to neutralize
the acid?
a– The NaOH solution.
b– The Ca(OH)2 solution.
c– More information is needed to answer this question.


4) How many of the following are oxidation–
reduction reactions?
• i. PCl3 + Cl2->PCl5
• ii. Cu + 2AgNO3->Cu(NO3)2 + 2Ag
• iii. CO2 + 2LiOH ->Li2CO3 + H2O
• iv. FeCl2 + 2NaOH ->Fe(OH)2 + 2NaCl
a) 0 b) 1 c) 2 d) 4


I need explanations plz

I would appreciate your help :)
 
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