The discharge of phosphate in detergents to the environment has led to imbalances in the life cycle of freshwater lakes. A chemist uses a spectrometric method to measure total phosphate and obtains the following data for known standards:
(b) If a sample of lake water has an absorbance of 0.55, what is its phosphate concentration?

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23-08-2022
Chemistry

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The discharge of phosphate in detergents to the environment has led to imbalances in the life cycle of freshwater lakes. A chemist uses a spectrometric method to measure total phosphate and obtains the following data for known standards:
(b) If a sample of lake water has an absorbance of 0.55, what is its phosphate concentration?

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Tutorconsortium357 Tutorconsortium357 · Answer 1 · 2022-08-27T13:05:49+02:00

That is, if all phosphorus is used, plant growth will cease, no matter how much nitrogen is available. The natural background levels of total phosphorus are generally less than 0.03 mg/L. The natural levels of phosphate usually range from 0.005 to 0.05 mg/L.

What are normal phosphate levels in water?

Regulation: In 1986, the Environmental Protection Agency (EPA) established the following recommended criteria for phosphorus: No more than 0.1 mg/L for streams that do not empty into reservoirs; no more than 0.05 mg/L for streams discharging into reservoirs; and no more than 0.024 mg/L for reservoirs.

How much phosphate does a lake need?

A target level of 20 micrograms of phosphorus per litre of lake water could help keep many lakes safe for recreation by restricting the growth of harmful algal blooms, European research suggests.

Learn more about phosphate in lake here:

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What are normal phosphate levels in water?

How much phosphate does a lake need?

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