Estimate the concentration of bromide needed to perform a tracer test if deliver

Question

Estimate the concentration of bromide needed to perform a tracer test if delivered as a slug in a 1 L solution to a 5000 L reactor presumed to be nearly completely mixed that has a flow rate of 40 L/min. Because of limitations in your analytical equipment, you want concentration in measures outflow samples to be no greater than 100 mg/L. Over what time period should samples be collected? Estimate the concentration of bromide needed to perform a tracer test if delivered as a slug in a 1 L solution to a 5000 L reactor presumed to be nearly completely mixed that has a flow rate of 40 L/min. Because of limitations in your analytical equipment, you want concentration in measures outflow samples to be no greater than 100 mg/L. Over what time period should samples be collected? Estimate the concentration of bromide needed to perform a tracer test if delivered as a slug in a 1 L solution to a 5000 L reactor presumed to be nearly completely mixed that has a flow rate of 40 L/min. Because of limitations in your analytical equipment, you want concentration in measures outflow samples to be no greater than 100 mg/L. Over what time period should samples be collected? Estimate the concentration of bromide needed to perform a tracer test if delivered as a slug in a 1 L solution to a 5000 L reactor presumed to be nearly completely mixed that has a flow rate of 40 L/min. Because of limitations in your analytical equipment, you want concentration in measures outflow samples to be no greater than 100 mg/L. Over what time period should samples be collected?

Explanation / Answer

Mass of Br- = 40 gm

required = 100 mg/L

   = 0.1 g/L

= 0.1/40 mol/L

   =0.0025 M

Concentration is 0.0025 M

Since 40 L is flowing per min.

mass of Br- in 40 L = 40 * 0.0025 = 0.1 g = 100 mg

So it should be collected after each minute

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