Recall that you are on the board of trustees for a Wisconsin township that frequently experiences winter temperatures of -16 °C. You are responsible for ensuring that the city’s 30,000 residents are able to travel safely in even the coldest and iciest conditions. You must decide if the city purchases the pre

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Recall that you are on the board of trustees for a Wisconsin township that frequently experiences winter temperatures of -16 °C. You are responsible for ensuring that the city’s 30,000 residents are able to travel safely in even the coldest and iciest conditions. You must decide if the city purchases the pre-prepared ice melt blend or proposes a new blend for use in winter 2022. You must consider environmental impact, lowest effective temperature, cost, and your experimental results in your decision. Of note, the pre-prepared blend would simplify logistics for the city, but the company’s price includes a $5/ton mixing fee; if you create your own blend, the cost would simply be calculated from the 2022 projected prices of pure compounds in Table 2.1 plus the $5/ton mixing fee.

Would you recommend the city purchase the pre-prepared blend or change the percent composition of blended ice melt? Regardless of which choice you recommend, you must include the following in your response:

  • percent composition for your recommended ice melt
  • price per ton (You do not need to show your work)
  • why this ice melt is ideal from an environmental impact perspective
  • will the lowest effective temperature meet the needs of the Wisconsin township?
      • You do not need to calculate a new lowest effective temperature.
  • use your experimental results to support your response.

NOTE: Be sure to respond in complete sentences

Product
NaCl
KCI
CaCl₂
Commercial
Ice Melt*
Estimated Cost,
Winter 2023
($/metric ton)
$58.00
$252.00
$125.00
$132.52
Environmental Impact
Moderately corrosive Moderate aquatic
toxicity Causes vegetation damage Linked to
salt toxicosis in birds
Moderately corrosive High aquatic toxicity
Improves soil (K+ fertilizer) Little or no
wildlife effects
Extremely corrosive Moderate aquatic toxicity
Ca²+ improves plant growth Little or no
wildlife effects
Moderately corrosive Moderate aquatic
toxicity Causes vegetation damage
Improves soil (K+ fertilizer) Minimized wildlife
effects
* Commercial Ice Melt is 55% NaCl, 31% KCl, and 14% CaCl₂
Lowest Effective
Temperature, °C
-6.7
-11
-31
-15
Transcribed Image Text:Product NaCl KCI CaCl₂ Commercial Ice Melt* Estimated Cost, Winter 2023 ($/metric ton) $58.00 $252.00 $125.00 $132.52 Environmental Impact Moderately corrosive Moderate aquatic toxicity Causes vegetation damage Linked to salt toxicosis in birds Moderately corrosive High aquatic toxicity Improves soil (K+ fertilizer) Little or no wildlife effects Extremely corrosive Moderate aquatic toxicity Ca²+ improves plant growth Little or no wildlife effects Moderately corrosive Moderate aquatic toxicity Causes vegetation damage Improves soil (K+ fertilizer) Minimized wildlife effects * Commercial Ice Melt is 55% NaCl, 31% KCl, and 14% CaCl₂ Lowest Effective Temperature, °C -6.7 -11 -31 -15
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