Ca2+, Hg2+ , Mg2+,Fe2+
2006-09-11 05:45:28 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
They are all pollutants, even in trace amounts.
As others have said, Mercury is toxic, but I would question the toxicity in trace amounts. The level of mercury allowed in fish is toxic.
But I think you are listing molecules rather than ions, unless the notation is changed.
In the old days, ions were notated with a positive superscript, but even given the limitations of the keyboard, you could have listed + or ++, or maybe - or --, rather than 2.
Good luck
2006-09-19 05:17:05 · answer #1 · answered by Anonymous · 3⤊ 0⤋
Hg2+
2006-09-19 04:47:31 · answer #2 · answered by rudedogg 1 · 0⤊ 0⤋
Hg2+
2006-09-17 09:19:46 · answer #3 · answered by Aushbaba 3 · 0⤊ 0⤋
Hg2+ is a pollutant in drinkin water even in trace amount.
Properties of mercury:
MCLG1
(mg/L)2=.002
MCL or TT1
(mg/L)2=.002
Potential Health Effects from Ingestion of Water=Kidney damage
Sources of Contaminant in Drinking Water=Erosion of natural deposits; discharge from refineries and factories; runoff from landfills and croplands
2006-09-11 06:37:54 · answer #4 · answered by Anonymous · 1⤊ 0⤋
In Trace Amounts it will be Hg2+ that is Mercury...
2006-09-11 06:06:32 · answer #5 · answered by Ashish Samadhia 3 · 0⤊ 0⤋
Hi. I agree with the first answer, Mercury. The problem is that it concentrates in the food chain and each higher order of life gets a higher dose.
2006-09-11 05:49:44 · answer #6 · answered by Cirric 7 · 0⤊ 0⤋
Color, Odor, and Turbidity
They are unexpected parameters in water. Can be treated by aeration, precipitation and filtration. Although turbidity does not cause any diseases, shows that there may be other pollutants in water.
Conductivity
Refers the dissolved ions in water. As the water gets purer the conductivity decreases. Its unit is the opposite of resistance and micro s/cm. Especially in electronics, glass industry, accumulator industry and laboratories... etc water with less conductivity preferred and water is treated for such purposes.
Total dissolved solids TDS
It shows the total amount of dissolved solids in water and has a 1/2 proportion with conductivity.
pH value
pH is the (-) logarithm of the amount of Hydrogen ions of the water consists
Dissolved carbonates, bio-carbonates and carbon-dioxide gives the pH value of raw water. The expected pH value differs between 5,5 - 8,5 according to the place of usage.
Alkalinity
It is composed of the amount of hydroxide, carbonate and bio-carbonates in water. Alkalinity is symbolized with P (phenol phtalein ), M (methyl orange ) alkalinities. We can find the amounts of hydroxide, carbonate and bio-carbonates in water from P and M values.
Iron
Iron gives an unexpected color and leaves residue to water. Residue and blocking's in boilers are mostly caused by iron. It causes problems in textile, leather, and paper industries. Also in every consumption, iron cause blockage, color, odor problems.
Suspended Solids
It has been known as un-dissolved materials in water and causes blockage in systems.
Hardness
Hardness in water is caused by magnesium, calcium or both in geological layers. Salts of dissolved magnesium and calcium show us the amount of hardness. It generally referred with CaCO3 amount in water as mg/lt CaCO3.
Types of Hardness
Temporary hardness
Permanent hardness
Temporary Hardness: It shows the amount of Ca and Mg salts that water contains. These hardness causing materials is decomposed by giving CO2 with boiling water. Calcium carbonate and magnesium hydroxide precipitates as the water boiled. Temporary hardness is the hardness which can be removed by boiling.
Permanent Hardness: Hardness caused by Mg and CaSO4, Cl and nitrate salts. They don’t decompose with raising temperature.
Total hardness is the total amount of temporary and permanent hardness. It can sometimes divided into two as Ca and Mg hardness. Dissolved Ca and Mg ions in minerals and rocks in underground water causes hardness. According to the soil type hardness can be differ from 4 - 180 Fr.
2006-09-15 19:12:37 · answer #7 · answered by eidderf 2 · 0⤊ 0⤋
hg mercury is a pollutant even in trace amount.the next one is iron
2006-09-18 12:47:00 · answer #8 · answered by charles great 2 · 0⤊ 0⤋
Mercury. The other ions are a nuisance, but they are not toxic.
2006-09-11 05:47:14 · answer #9 · answered by Anonymous · 0⤊ 0⤋
a pollutant--all of them---a toxin mercury
2006-09-11 05:50:50 · answer #10 · answered by Jack Kerouac 6 · 0⤊ 0⤋