In grade 11 I was told the formula was MnO4 with a charge of 2-. Now in grade 12 my new teacher says it is MnO3 with a charge of 1-...
I think personally that the first one is right because my new teacher seems pretty bad at following the rules and frequently puts "+2" rather than "2+" for ions in the superscript, and says it is good practice to put "+1" on ions like potassium rather than just "+".
Could someone please help me solve this predicament? :p
2007-09-12 09:41:29 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Your grade 11 teacher was indeed correct: Manganate is MnO4=.
Here's how you do it: Saw open a battery (dry cell) and recover the black powder manganese dioxide inside. Take a porcelain dish, add potassium hydroxide pellets, and heat with a Bunsen burner. The KOH melts. Add the MnO2 to the KOH melt. The MnO2 disproportionates (it reacts to produce Mn of a higher and a lower oxidation state). The molten liquid turns dark green. This is potassium manganate (K2MnO4). It is possible to isolate potassium manganate. Most practitioners choose to add K2MnO4 to water, or acidify the mixture, whereupon the MnO4= again disproportionates into KMnO4 and lower oxidation states of manganese. This is actually how KmnO4 is made commercially. The key is to send all those lower oxidation state compounds of manganese back through the KOH fusion, and you're in business.
2007-09-12 09:56:56 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
Manganate Formula
2016-12-15 08:07:11 · answer #2 · answered by coury 4 · 0⤊ 0⤋
This Site Might Help You.
RE:
What exactly is the formula for manganate?
In grade 11 I was told the formula was MnO4 with a charge of 2-. Now in grade 12 my new teacher says it is MnO3 with a charge of 1-...
I think personally that the first one is right because my new teacher seems pretty bad at following the rules and frequently puts "+2" rather than...
2015-08-18 18:02:30 · answer #3 · answered by Cheslie 1 · 0⤊ 0⤋
Manganate Ion
2016-11-12 21:07:45 · answer #4 · answered by filguieras 4 · 0⤊ 0⤋
Manganate is MnO4(2-)
Permanganate is MnO4(1-)
As an aside - there is not absolute convention as to whether you write 2+ or +2, some people even write ++ (but that is VERY old school). You can use any of those methods.
Oz
2007-09-12 09:52:32 · answer #5 · answered by Dr Oz 3 · 1⤊ 0⤋
manganate ion is MnO4(2-)
permanganate is MnO4(1−)
Hypomanganate, MnO4(3-)
manganite MnO4(4- )
probably confusing to you, but theres all the different oxidation stattes of Mn oxides
It exists in all those forms.
2007-09-12 09:51:49 · answer #6 · answered by billgoats79 5 · 0⤊ 1⤋
Manganate(VI) is (MnO4)2- and manganate(VII) is (MnO4)-.
So there are two to choose from, but neither of them is MnO3.
(MnO4)- is the normal, purple one.
2007-09-12 09:50:31 · answer #7 · answered by Gervald F 7 · 0⤊ 0⤋
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That is a difficult relationship. Love is sooo encompassing that it almost seems impossible to not have love and respect. But it is not the case. Respect is earned. Respect is a logical emotion. Love can be neither of those. For many years I was a disgrace to my family. My father and I had no relationship and it was probably better that way. I am confident to say he had no respect for me. But, he did still love me. This became apparent when I did clean up my life that I saw that although he may have not always respected me, he always loved and cared for me. Just a personal example.
2016-03-29 05:13:43 · answer #8 · answered by Anonymous · 0⤊ 0⤋
manganate is MnO3; permanganate is MnO4; each with a -1 charge.
2007-09-12 09:46:35 · answer #9 · answered by vv 6 · 0⤊ 3⤋
A lie. Love, respect and care goes hand in hand. They are all needed to be true.
2016-03-19 11:07:55 · answer #10 · answered by Anonymous · 0⤊ 0⤋