Chemistry, 30.01.2020 10:03 314180

What is the oxidation number of mn in kmno4

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Answer from: alee885

Since O almost always has a charge of -2, the oxygen atoms have an overall charge of -8 (-2*4)

Since K has a charge of +1, that brings the overall charge to -7 (-8+1)

Then, in order for the overall charge to be 0, Mn would have to have a change of +7 (-7+7=0)

Hope this helps

Answer from: CSelmon23

KMnO₄ has an overall neutral charge, so that means that the total oxidation numbers should sum up to 0.

Oxygen will almost always have an oxidation number of -2, and K, because it is a group 1A metal, has an oxidation number of +1

There are 4 oxygens so the total oxidation number is 4*-2 = -8
And K has an oxidation number of +1

We are trying to find out the oxidation number of Mn. Remember since our compound is neutral, the sum of the oxidation numbers should be 0. So if we call the oxidation number of Mn as X, we then know that

X + (-8) + 1 = 0
X = -1 + 8
X = 7

Therefore, Mn has an oxidation number of 7.

Answer from: Quest

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

Answer from: Quest

answer: e. sour taste

explanation: acids are those substances which dissociates in water to give $h^+$ ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

$hcl\rightarrow h^++cl^-$

bases are those substances which dissociates in water to give $oh^-$ ions or accepts $h^+$ ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

$naoh\rightarrow na^++oh^-$

$nh_3+h^+\rightarrow nh_4^+$

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