A 0.645 g sample of cobalt, Co, is added to 239 mL of 0.100 M H,SO, to produce cobalt(II) sulfate and hydrogen gas. Co(s) + H,SO,(aq) → CoSO,(aq) + H,(g) What is the limiting reactant? Co(s) H,SO,(aq) A volume of 153 mL of hydrogen is collected over water. The water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 101.325 kPa, the temperature is 25 °C, and the vapor pressure of water at 25 °C is 3.167 kPa. What is the percent yield of hydrogen gas for this reaction? percent yield:

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A 0.645 g sample of cobalt, Co, is added to 239 mL of 0.100 M H, SO, to produce cobalt(II) sulfate and hydrogen gas.
Co(s) + H,SO,(aq)
→ CoSO,(aq) + H,(g)
What is the limiting reactant?
Co(s)
O
H, SO, (aq)
A volume of 153 mL of hydrogen is collected over water. The water level in the collecting vessel is the same as the outside
level. Atmospheric pressure is 101.325 kPa, the temperature is 25 °C, and the vapor pressure of water at 25 °C is
3.167 kPa.
What is the percent yield of hydrogen gas for this reaction?
percent yield:
%
Transcribed Image Text:A 0.645 g sample of cobalt, Co, is added to 239 mL of 0.100 M H, SO, to produce cobalt(II) sulfate and hydrogen gas. Co(s) + H,SO,(aq) → CoSO,(aq) + H,(g) What is the limiting reactant? Co(s) O H, SO, (aq) A volume of 153 mL of hydrogen is collected over water. The water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 101.325 kPa, the temperature is 25 °C, and the vapor pressure of water at 25 °C is 3.167 kPa. What is the percent yield of hydrogen gas for this reaction? percent yield: %
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Answer - Here I have explained the step by step solution . Hope this will really gonna help you !!!!!

 

So lets calculate the no of moles of cobalt (Co) = mass of cobalt / molar mass of cobalt

moles of cobalt = 0.645 g / 58.93 g-mol-1 = 0.0109 mol

 

moles of H2SO4   = 0.100 M * 239 mL * 0.001 L/mL = 0.0239 mol

 

Now according to the balanced reaction Co and H2SO4 will react in 1:1 mole ratio . But Co is in lesser (mol) amount . So the   limiting reagent will be = Co (Cobalt)

 

 

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