need help please will upvote

1. A surface water with the constituents in the table below has a pH of 8.1 and dissolved CO2 concentration of 1.1105M. The flow rate required for drinking water treatment to serve the b. Calculate the lime and soda ash dosage needed (in mg/L as CaCO3 ) for selective calcium removal (i.e. remove only calcium), carbonate hardness removal, and total hardness removal. c. Jar testing determined an optimum alum dose of 15mg/L for particle removal. Based on this dose, determine the alkatinity consumed (mg/L as CaCO3), alkalinity remaining ( mg/L as CaCO3), and alum required (kg/yr). d. A mechanical rapid-mix tank is to be designed to add this alum with a detention time of 10sec and a velocity gradient of 700sec1. Determine the tank volume and power requirement. The dynamic viscosity at 18C is 1.053103Nsec/m2. e. Particles resulting from the alum addition result in an average size of 100m diameter and a specific gravity of 1.05. Calculate the settling velocity if the density of water at 18C is 998.6kg/m3 and determine the percent removal of these particles in a sedimentation basin with a depth of 2.5m, width of 4m, and length of 40m