1) If the reaction of sodium metal and water was conducted with 10.0 g of sodium

Question

1) If the reaction of sodium metal and water was conducted with 10.0 g of sodium and 10.0g of water to make sodium hydroxide and hydrogen gas. Then the limiting reagent is which species?   2Na + 2H2O --> 2NaOH + H2

a) Na

b) H2O

c) H2

d) NaOH

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2) The most common error when preforming a standardization titration, is when additional titrant is added past the equivalence point. If in your experiment you had added an excess volume of NaOH, so the flask turned dark pink, how would this error affect your experimental value for the concentration of NaOH? Calculated concentration of NaOH would be _______ than the true value.

a) Higher

b) Unchanged

d) Lower

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3) A student was isolating copper metal from a copper salt. If the student started with 1.255g of copper (II) sulfate how many grams of copper solid would you expect them to recover?

a) 63.504g

b) 0.007997g

c) 0.5081 g

d) 1.255g

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4) If a solution of AgNO3 was added to a solution of NaCl which of the following species would you NOTexpect to see in the resulting solution?

a) NO3-(aq)

b) Na+ (aq)

c) AgNa(s)

d) AgCl(s)

Explanation / Answer

1) A ) Na

2)d) Lower

3)c) 0.5081 g

4) c) AgNa(s)

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