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18 Nov 2019
The quantity of atmospheric SO_2(g) can be determined by reaction with H_2O_2(aq), according to the balanced chemical equation shown below. H_2O_2(aq) + SO_2(g) rightarrow H_2SO_4(aq) The amount of sulfuric acid produced can be determined by titration with sodium hydroxide of known concentration. An 535.0 gram sample of an air that is known to contain sulfur dioxide was reacted with excess hydrogen peroxide. Given that 18.50 mL of a 0.00250 M NaOH(aq) were required to neutralize the H_2SO_4(aq) produced, calculate the mass percentage of SO_2(g) in the air sample. 0.000269 % SO_2(g) Here is a step-wise procedure for solving this problem: 1. Write and balance the equation for the neutralization reaction between NaOH and H_2SO_4. 2. Calculate the number of moles of NaOH in 18.50 mL of 0.00250 M NaOH. 3. Convert from moles of NaOH to moles of H_2SO_4 using the chemical equation from step 1. 4. Convert from moles of H_2SO_4 to of moles of SO_2 using the chemical equation given in the question. 5. Convert from moles to grams of SO_2 using the molar mass of SO_2 6. Express the mass of SO_2 as a percentage of the total mass of the air sample.
The quantity of atmospheric SO_2(g) can be determined by reaction with H_2O_2(aq), according to the balanced chemical equation shown below. H_2O_2(aq) + SO_2(g) rightarrow H_2SO_4(aq) The amount of sulfuric acid produced can be determined by titration with sodium hydroxide of known concentration. An 535.0 gram sample of an air that is known to contain sulfur dioxide was reacted with excess hydrogen peroxide. Given that 18.50 mL of a 0.00250 M NaOH(aq) were required to neutralize the H_2SO_4(aq) produced, calculate the mass percentage of SO_2(g) in the air sample. 0.000269 % SO_2(g) Here is a step-wise procedure for solving this problem: 1. Write and balance the equation for the neutralization reaction between NaOH and H_2SO_4. 2. Calculate the number of moles of NaOH in 18.50 mL of 0.00250 M NaOH. 3. Convert from moles of NaOH to moles of H_2SO_4 using the chemical equation from step 1. 4. Convert from moles of H_2SO_4 to of moles of SO_2 using the chemical equation given in the question. 5. Convert from moles to grams of SO_2 using the molar mass of SO_2 6. Express the mass of SO_2 as a percentage of the total mass of the air sample.
Collen VonLv2
7 Jun 2019