Mining Feasibility Letter - Example 1
April 15, 2013
Dear Mrs. Brown
Our lab group performed a series of titrations to determine the feasibility of mining ore on your site. First 35.0 mL of the iron sulfate slurry sent to us was measured out. This was placed underneath a buret filled with 1.700 M KMnO4. The titration was started and when a noticeable change took place in the color of the slurry the titration was stopped. We recorded the amount of KMnO4 required to titrate the slurry and repeated the procedure twice more. The data was then averaged together and the volume of KMnO4 needed to completely titrate the slurry was found to be 16.75 mL. The concentration of the slurry was found using the formula C(a)V(a)=C(b)V(b). We plugged in the numbers to get the equation (1.700 M)(16.75 mL)=(x M)(35.0 mL) and got the concentration as 0.81 M. The liters of the molarity is changed to 1.0 x 105 making the moles change to 81000 mol. We then found the percentage of iron in the slurry in order to find the moles of iron in the slurry. We found the percentage to be 43.8% making the moles 35478 mol. The moles are changed to grams using the molar mass giving us 1,972,576.8 grams. Grams are then changed to kilograms and the kg/1.0 x 10^5L are found. Based on these calculations, we found there to be 1,973 kg/105 L . Since the lowest amount of kg needed to make your mining feasible is 150 kg/105 L, we would definitely recommend mining in this site.
Sincerely,
Larry, Curly and Moe