Why do we not test each metal against a solution containing that metal? What would you observe if you did?

Question 1

a) Which metals from Table 8.1 ( copper, zinc, lead, magnesium) are considered VERY ACTIVE (react with water and aqueous hydrochloric acid), MODERATELY ACTIVE (react with aqueous hydrochloric acid but not water) or have LOW ACTIVITY (do not react with either)?

 

VERY ACTIVE: 

MODERATELY ACTIVE: 

LOW ACTIVITY: 

 

b) For the metals that reacted with water and/or aqueous hydrochloric acid, write out an appropriate redox reaction equation and assign oxidation numbers to ALL elements (HINT: Use Equations 8.10 and 8.11 in your laboratory manual in order to guide you).

 

 

c) From your equations above, identify the species that are the oxidising agents and reducing agents in each redox reaction. Provide an explanation for your choices. (HINT: Think about the oxidation numbers of each element and how they change).

 

Question 2

a) Why do we not test each metal against a solution containing that metal? What would you observe if you did?

 

b) Using your results complete the following redox equations. If no reaction occurred, then write ‘no reaction’ like in Equation 8.8 of your laboratory manual.

 

Mg(s) + Pb(NO3)2(aq) →

Pb(s) + MgSO4(aq) →

Equation 8.13 

Equation 8.14

 

 

e) Complete the Metal Activity Series below by considering the numbers you wrote in the final column of Table 8.2 (ignore Metal ‘Pg’ for the moment).

 

> > Metal Pg > >
Most Easily Oxidised Least Easily Oxidised

 

f) Assume a hypothetical metal Paulingium (Pg) appeared in the Activity Series as shown above. Would there be a reaction between magnesium (Mg) and an aqueous solution of PgSO4? If so, write a redox equation for this reaction and assign oxidation numbers to ALL elements.

 

Question 3

a) Complete the Halide Activity Series below by considering the numbers you wrote in the final column of Table 8.3. (HINT: Refer to page 7 of your Manual for more information).

 

> >
Most Easily Reduced Least Easily Reduced

 

b) From the Activity Series above, complete the following sentence:

 

″The ability to reduce elements in Group 17 _____________ as you go down the group.″

 

 

c) Based upon yours answers in Question 3a) and the periodic trend described in Question 3b), write out the full Halogen Activity Series below. Be sure to include Fluorine (F) and Astatine (At) in your answer.

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