Self Quiz
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Self Quiz

1. Which of the following properties would indicate an acid?

I. pH less than 7

II. Turns litmus paper to a blue color.

III. Turns phenolphthalein to a pink color.

a. I only

b. II only

c. I and II

d. I and III

e. II and III

 

2. Which of the following reactions would indicate a base?

a. reacts with water to give H3O+

b. reacts with water to give H2

c. reacts with a metal to give H2

d. reacts with HCO3- to give CO2

e. reacts with NH4+ to give NH3

 

Answer the following questions in the space provided.

3. Balance this equation and determine whether a precipitate is formed.

CaCl2 + AgNO3 ))> AgCl + Ca(NO3)2

 

4. Write a complete balanced equation for the reaction between iron(III) chloride and lead(II) nitrate. Is this a precipitation reaction? If so, identify the precipitate.

 

 

 

5. Write a complete balanced equation for the reaction between ammonium sulfide and copper(II) chloride. Is this a precipitation reaction? If so, identify the precipitate.

 

 

6. Write formulas for the following chemicals and determine whether they are soluble or insoluble in water.

sodium sulfate calcium nitrate iron(III) carbonate

 

 

7. Abbreviated solubility rules:

>  All sodium, potassium and ammonium salts are soluble.

>  All chloride salts are soluble except PbCl2, AgCl and HgCl.

>  All nitrate salts are soluble.

>  Hydroxides are insoluble except for NaOH, KOH and NH4OH.

Four solutions in bottles numbered 1 through 4 are:

AgNO3 HCl Mg(NO3)2 NaOH

 

Results of lab tests:

#1 is basic and precipitates with #3 and #4.

#2 is acidic and precipitates with #3.

#3 precipitates with #1 and #2.

#4 precipitates with #1.

Which chemical is in each bottle?

 

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E-mail instructor: Eden Francis

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