Agroundwater contains the following constituents: co2 9.6 mg/l mg2+ 25.8 mg/l hco, ca2+ 95.2 mg/l 198 mg/l as caco. the facility is to treat 50 x 106 l/d of water from this source using lime-soda ash to reduce the hardness. determine the quicklime and soda ash dosages for softening. assume the lime is 90% cao by weight and the soda ash is 97% pure sodium carbonate.

For the reaction, 4 a(g) + 3 b(g) => 2 c(g), the following data were obtained at constant temperature. experiment initial[a],mol/l initial [b],mol/l initial rate, m/min 1 0.200 0.150 5.00 2 0.400 0.150 10.0 3 0.200 0.300 10.0 4 0.400 0.300 20.0 which of the following is the correct rate law for the reaction? 1. rate = k[a]2[b]2 2. rate = k[a][b] 3. rate = k[a]2[b] 4. rate = k[a][b]2