Home > Community > How can lead nitrate be precipitated out of water in order to purify it?
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+ Nitrate
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How can lead nitrate be precipitated out of water in order to purify it?

Amir Syairazi  Follow

Yes, but untill it is washed off, it is absorbed by the skin.

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Corey Deane  Follow

Lead(II) nitrate is an inorganic compound with the chemical formula Pb(NO₃)₂. It commonly occurs as a colourless crystal or white powder and, unlike most other lead(II) salts, is soluble in water.

Can play upon Pb(NO3)2 solubility in water to separate from other lead salts. But will still be contaminated with other substances. Use other solvent also

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Andrew Silverman  Follow

Rain that falls over the ocean is typically salty, but minutely fractionally as salty as seawater. ... Sea salts sprayed by crashing waves and lofted are distinctly hygroscopic and evidence of this can be found clogged in the holes of a salt shaker that's been stored in high humidities

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Ann Tod  Follow

An effective removal mechanism of dissolved nitrates is achieved by plants absorbing the nitrate to utilise it to synthesise amino acids leading eventually to DNA.

That relationship is why you should have plenty of water plants growing in a fish pond to offset the pollution of the water by fish poo and decaying vegetation to produce NH3 that is converted to nitrite by bacteria and then to nitrate.

If your question relates to improving the potability of drinking water then the nitrates are readily removed by using ion-exchange resin or subjecting the water to reverse osmosis.

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Dawn Le Strat  Follow

It really is not possible. Using hydroxide or sulfide in a large excess will precipitate out the lead present. Then you have two new problems. The caustic water and sulfur-contaminated water will then need to be filtered and that will require advanced filtration with pH adjustment. The advanced filtration can remove the lead, to begin with, if you use RO. Nitrate is removed either with bacteria (as in a wastewater plant), advanced filtration, or by ion exchange. Precipitation is not an option. So bottom line, precipitation is not a viable option for lead nitrate.

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Alyssa Morrill  Follow

It can be precipitated out by adding dilute HCl. Lead nitrate precipitates as white precipitate of lead(II) chloride.

Pb ^2+(aq) + 2Cl-(aq)→ PbCl2(s)

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Donna Bianca  Follow

It's easier to purify the lead chemically then react it with nitric acid to recreate the nitrate, but I think you are looking for something else.

Lead II nitrate is more than 4 times as soluble in water at 100°C than at 0°C. Also, it is more soluble in acid than base. So add sodium hydroxide to the solution to get it to pH of 7. Filter it with the finest filter. Heat to boiling and keep it there until a precipitate begins to form. Cool to 0°C. Filter out the lead II nitrate precipitate and save. Repeat boiling and cooling until you think impurities are coming out and discard.

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