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What is the oxidation state of Cr in SrCr2O7?
+6This compound has dichromate in it (Cr2O7-2). Oxygen almost always has an oxidation state of -2, which means the total charge for the oxygens is -14. The charge on the two chromates combined needs to be two less than the total charge on the oxygens because the ion has an overall charge of -2. Thus, the oxidation state for Cr is +6.
Why an oxide has -2 charge?
Oxygen itself has a charge of -2 as it is in group 6 of the table. It is not always -2 just to be careful, if there are more oxygens in the oxide, the result will be additive
What is the formula for manganese II acetate?
Mn(II)(C2H3O2)2 That's one Manganeese with charge (+2) with two molecules of acetate (two carbons, three hydrogens, and two oxygens) with a net charge of (-1) per molecule
Why is valency of sulphate -2?
Because sulfur is +6 (6 valence electrons) but there are 4 oxygens at -2 bound to it so its net charge is +6 - 4 x -2 = -2
What is oxygens natural state?
a gas
What is the charge for aluminum oxide?
Neutral, because there are 2 aluminiums each contributing +3 charge and 3 oxygens each with a -2 charge
What is the oxidation state of Cr in SrCr2O7?
+6This compound has dichromate in it (Cr2O7-2). Oxygen almost always has an oxidation state of -2, which means the total charge for the oxygens is -14. The charge on the two chromates combined needs to be two less than the total charge on the oxygens because the ion has an overall charge of -2. Thus, the oxidation state for Cr is +6.
What is the oxidation number of sulfur in Na2S2O8?
+6 for each sulphur. +1 for each Na; Two oxygens are as peroxides and will have -1 charge / oxidation number each. Six oxygens are as oxides and will have -2 charge each. So, 2(+1) + 2y + 2(-1) + 6(-2) = 0 Or y = +6 (the charge / oxidation number of sulphur)
Why an oxide has -2 charge?
Oxygen itself has a charge of -2 as it is in group 6 of the table. It is not always -2 just to be careful, if there are more oxygens in the oxide, the result will be additive
In potassium dichromate and potassium chromate the oxidation state of chromium is 6 but both have different colors?
Cr(VI) should have no unpaired electrons and have no color, but when bound to oxygen, charge transfer occurs from the O 2-. CrO4 (chromate) has four oxygens which all charge transfer to the Chromium giving orange color. In Cr2O7 (dichromate) one oxygen bridges between the two Chromium atoms so each only gets charge transfer from three oxygens. Cr(VI) should have no unpaired electrons and have no color, but when bound to oxygen, charge transfer occurs from the O 2-. CrO4 (chromate) has four oxygens which all charge transfer to the Chromium giving orange color. In Cr2O7 (dichromate) one oxygen bridges between the two Chromium atoms so each only gets charge transfer from three oxygens.
What is the formula for manganese II acetate?
Mn(II)(C2H3O2)2 That's one Manganeese with charge (+2) with two molecules of acetate (two carbons, three hydrogens, and two oxygens) with a net charge of (-1) per molecule
None polar molecules?
Non-polar molecules are ususally carbon saturated. Often contain no or very few Nitrogen or oxygens.
Why does sulfur have a 1 charge in sulfur dioxide?
I don't think sulfur has a charge since sulfur dioxide is a covalent bond. In covalent bonding no charge is produced because its between two nonmetals which share electrons. Since neither atom gains or loses electrons, the protons and electrons are balanced, producing no charge. In response to the answer above, I would first as a question. First by "charge" I assume you are referring to the oxidation number? If so, then you have to look at the charges on each of the atoms present in the molecule! First, oxygen has a -2 charge for each atom. Since Sulfur dioxide has TWO oxygens each oxygen has a -2 charge meaning that there is a total -4 charge for the two oxygens. Since sulfur dioxide doesn't have a charge on the molecule, all the charges for all the atoms must add up to 0. The oxygens already have a -4 charge which means that the sulfur has a +4 charge! Of course all of this is in reference to oxidation numbers. I'm thinking the first person to post might have been confusing the charge on the molecule with the oxidation numbers of each of the atoms?
What is oxygens oder?
it has no oder .
What is wrong with the formula H4PO1?
H4PO1 isn't anything. I believe you meant H3PO4. Remember, Phosphate (PO4) is a polyatomic, which means that the molecule PO4 stays together. The charge is 3-. And H is +1. The 4 on the oxygen is NOT A CHARGE. It is the number of oxygens on the molecule.
Why the valency of Nitrogen not 5 in N2O5?
The simplest answer is that none of the oxygens in N2O5 have a -2 formal charge, so giving nitrogen a +5 formal charge would lead to a charge imbalance. Since the molecule must be charge neutral, we know that the nitrogen must have a different formal charge. (Proof by Contradiction) The more complicated answer requires a discussion of the bonding in N2O5. As explained in the video in the Related Link, each of the nitrogens sits touching three oxygens, with one of these three being shared with the other nitrogen. The "middle" oxygen is single-bonded to each nitrogen, meaning that the oxygen in question has a 0 formal charge. On the extremities, there are two oxygens that are single-bonded to a nitrogen and two oxygens that are double-bonded. The single-bonded ones have a -1 formal charge and the double bonded ones have a 0 formal charge. This makes the total formal charge coming from the five oxygens to be 0+0-1-1+0 = -2. Therefore the nitrogens must each be +1 since the structure is parallel and the charge must be neutral. Oh dear what a strange question. In simple classical pre- GN Lewis octet rule following the definition of valency the valency of N is 5. two double bonds one single surrounding each N. (this old theory would give 10 valence electrons around the N) From an oxidation number point of view (sometimes termed valency these days) the N atoms oxidation #'s are +5. However if you apply the octet rule you get a different answer , involving charged structures which in valence bond theory resonate. This is I think what the answer above is getting at.
Why is valency of sulphate -2?
Because sulfur is +6 (6 valence electrons) but there are 4 oxygens at -2 bound to it so its net charge is +6 - 4 x -2 = -2
