Term
| What determinantal effect may dissolved chelating agents have upon conventional biological waste treatment? |
|
Definition
| Solubilization and mobilization of heavy metals |
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Term
| What common complex compound of magnesium is essential to certain life processes? |
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Definition
| Chlorophyll, which contains magnesium |
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Term
| What is always the ultimate product of polyphosphate hydrolysis? |
|
Definition
Orthoposphate: PO43-
or its acid derivatives
HPO42- and H2PO4- |
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Term
| What is the acidity of a metal ion dependent on? |
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Definition
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Term
| Acidity of a metal ion increases with what? |
|
Definition
increases with increasing cationic charge
(increase in charge density) |
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Term
| Acidity of a metal ion decreases with what? |
|
Definition
| decreases with increase in radius |
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Term
| Fresh water contains calcium in high concentrations. What is the concentration of magnesium to calcium |
|
Definition
| magnesium is 1/5 of calcium |
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Term
| Polyphosphates are added to detergents as what? |
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Definition
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|
Term
| What is the chemical formula of orthophosphate? |
|
Definition
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|
Term
| What is the chemical formula of pyrophosphate? |
|
Definition
|
|
Term
| What is the pyrophosphate reaction? |
|
Definition
|
|
Term
| What is the structure of Triphosphate? |
|
Definition
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|
Term
| What is a better chelator cyclic or branched phosphates? |
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Definition
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Term
|
Definition
| A species binds with a metal ion. |
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Term
|
Definition
| The species that binds to the metal ion |
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Term
|
Definition
| Metal cation combined with an electron donor |
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Term
| Define uni-/mono-dentate ligand |
|
Definition
| ligand that possess only one site that binds to a metal ion |
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|
Term
| Define poly dentate ligand |
|
Definition
| ligand that posesses more than one site that binds to a metal ion |
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|
Term
|
Definition
| has more than one atom that may be bonded to a central metal ion at one time to form a ringed structure |
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Term
| What are trends for a chelating agent? |
|
Definition
more tightly bound with more interactions
increase in bonding = increase in stability |
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Term
| What is Nitrilotracetic acid (NTA) designated as? |
|
Definition
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|
Term
| What are the pkas for NTA |
|
Definition
|
|
Term
| What does chelation depend on? |
|
Definition
1)Complex stability
2)pH (competition with protons)
3)Concentration of ligand (Le Chatliers principle) |
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|
Term
| Define coordination number: |
|
Definition
| is the number of ligand electron-donating groups that are bound to a metal ion |
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|
Term
| Why is NTA environmentally persistent? |
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Definition
| Because it is thermodynamically stable and is biodegradable. |
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