9.08. Given the following data: 1.000 ml of NaOH« 1.117 ml HCI. The HCI is 0.4876 N. How much water should be added to 100 ml of the alkali to make it 0.5000 N?

Experiment: determination of molar volume of gas at STP

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A lake with 100 x 107 m² of surface area is fed by a stream having 45 m³/s of flow with 2.3 mg/L phosphorus. Phosphorus is also entering the lake through an industrial wastewater treatment plant discharges at 1.4 m³/s containing 235 mg/L phosphorus. If the lake is well mixed and the phosphorus settling rate is 13 m/yr, estimate the steady-state phosphorus concentration in the lake. What level of phosphorus removal at the treatment plant would be required to keep the average phosphorus concentration in the lake below 0.30 mg/L?