Normal rain has a pH of 5.6 due to dissolved atmospheric carbon dioxide at a current...

  
 
 

 

Transcribed Image Text:

Normal rain has a pH of 5.6 due to dissolved atmospheric carbon dioxide at a current level of 400 ppm. Various models predict that burning fossil fuels will increase the atmospheric CO₂ concentration to between 500 and 1000 ppm (by volume) by the year 2100. Calculate the pH of rain in a scenario where the CO₂ concentration is 550 ppm. Part A First use Henry's Law to calculate the concentration of dissolved CO₂. Solubility = kx P and the Henry's Law constant (k) for CO2 at 25 °C is 3.2 x 10-2 mol/(L atm). Express your answer to two significant figures and include the appropriate units. I Submit HA Solubility= Value Request Answer C Units P ? Part B Next calculate the pH of the rain. CO2 reacts with water to produce carbonic acid according to the equation: CO₂ (aq) + H₂O(1) = H₂CO3(aq) Assume all the dissolved CO₂ is converted to H₂CO3. Acid dissociation constants for H₂CO3 are Kal 4.3 x 10-7; K₁2 = 5.6 x 10-11. Express your answer to two decimal places. pH = Submit 15. ΑΣΦΑ Request Answer → www Part C Will rising CO₂ levels affect the acidity of rainfall? Yes, the acidity of rain will increase significantly. Yes, the acidity of rain will decrease but only slightly. Yes, the acidity of rain will increase but only slightly. Yes, the acidity of rain will decrease significantly. No, the acidity of rain will stay the same. Submit Request Answer Normal rain has a pH of 5.6 due to dissolved atmospheric carbon dioxide at a current level of 400 ppm. Various models predict that burning fossil fuels will increase the atmospheric CO₂ concentration to between 500 and 1000 ppm (by volume) by the year 2100. Calculate the pH of rain in a scenario where the CO₂ concentration is 550 ppm. Part A First use Henry's Law to calculate the concentration of dissolved CO₂. Solubility = kx P and the Henry's Law constant (k) for CO2 at 25 °C is 3.2 x 10-2 mol/(L atm). Express your answer to two significant figures and include the appropriate units. I Submit HA Solubility= Value Request Answer C Units P ? Part B Next calculate the pH of the rain. CO2 reacts with water to produce carbonic acid according to the equation: CO₂ (aq) + H₂O(1) = H₂CO3(aq) Assume all the dissolved CO₂ is converted to H₂CO3. Acid dissociation constants for H₂CO3 are Kal 4.3 x 10-7; K₁2 = 5.6 x 10-11. Express your answer to two decimal places. pH = Submit 15. ΑΣΦΑ Request Answer → www Part C Will rising CO₂ levels affect the acidity of rainfall? Yes, the acidity of rain will increase significantly. Yes, the acidity of rain will decrease but only slightly. Yes, the acidity of rain will increase but only slightly. Yes, the acidity of rain will decrease significantly. No, the acidity of rain will stay the same. Submit Request Answer

Answer rating: 100% (QA)

Part A Henrys Law allows us to figure out how much dissolved CO2 is in the rainfall Per Henrys Law solubility is equal to k P Where The concentration ... View the full answer