Summative Assessment Questions&Answers



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Summative Assessment Questions&Answers


  1. Lithium hydroxide reacts with hydrobromic acid to produce lithium bromide and water. If you start with ten grams of lithium hydroxide, how many grams of lithium bromide will be produced?



  2. Ethylene (C2H4 ) reacts with oxygen gas to produce carbon dioxide and water. If you start with 45 grams of ethylene, how many grams of carbon dioxide will be produced?



3. Given the equation: HCl + Na2SO4  NaCl + H2SO4
If you start with 20 grams of hydrochloric acid, how many grams of sulfuric acid will be produced?

1A) LiOH + HBr  LiBr + H2O


If you start with ten grams of lithium hydroxide, how many grams of lithium bromide will be produced? 36.3 grams

2A) C2H4 + 3 O2  2 CO2 + 2 H2O


If you start with 45 grams of ethylene (C2H4), how many grams of carbon dioxide will be produced? 141.4 grams

3A) 2 HCl + Na2SO4  2 NaCl + H2SO4


If you start with 20 grams of hydrochloric acid, how many grams of sulfuric acid will be produced? 26.9 grams
Second set of samples:

  1. Sulfur dioxide can be produced in the laboratory by the reaction of hydrochloric acid and a sulfite salt such as sodium sulfite. (Na2SO3 + 2HCl  2NaCl + SO2 + H2O) What mass of SO2 can be made from 25.0 g or Na2SO3 and 22.0 g of HCl?



  2. The rare earth metal terbium is produced from terbium (III) fluoride and calcium metal by the following single replacement reaction: 2TbF3 + 3 Ca  3CaF2 + 2Tb

    1. Given 27.5 g of TbF3 and 6.96 g of Ca, how many grams of terbium could be produced?

1A)


Sulfur dioxide can be produced in the laboratory by the reaction of hydrochloric acid and a sulfite salt such as sodium sulfite. (Na2SO3 + 2HCl  2NaCl + SO2 + H2O) What mass of SO2 can be made from 25.0 g or Na2SO3 and 22.0 g of HCl? 11.3 grams SO2

2A) The rare earth metal terbium is produced from terbium (III) fluoride and calcium metal by the following single replacement reaction: 2TbF3 + 3 Ca  3CaF2 + 2Tb



    1. Given 27.5 g of TbF3 and 6.96 g of Ca, how many grams of terbium could be produced? 18.4 grams Tb

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