1))According to the following reaction, how many grams of water are needed to fo
ID: 631127 • Letter: 1
Question
1))According to the following reaction, how many grams of water are needed to form 27.6 grams of oxygen gas? water (l) hydrogen (g) + oxygen (g) 2))According to the following reaction, how many grams of calcium hydroxide are required for the complete reaction of 24.8 grams of sulfuric acid? sulfuric acid (aq) + calcium hydroxide (s) calcium sulfate (s) + water (l) 3))According to the following reaction, how many grams of sulfurous acid (H2SO3) will be formed upon the complete reaction of 21.5 grams of water with excess sulfur dioxide? sulfur dioxide (g) + water (l) sulfurous acid (H2SO3) (g)Explanation / Answer
1)
2water---> 2H2+O2
no. of moles of O2= 27.6/32 = 0.8625
so, wt of water needed = 2*0.8625*18 = 31.05 grams
2)
Ca(OH)2 +H2SO4 ------> CaSO4 + 2H2O
grams of Ca(OH)2 = (24.8/98)*74 =18.7265 grams
3)
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