04.04 MC) When calcium metal (Ca) reacts with oxygen gas (O2), it produces the ionic compound calcium oxide (CaO). Write the balanced equation for this reaction. Then, explain if this process meets the requirements to be considered a redox reaction. (6 points)

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Explanation:

A redox reaction is one in which there is a loss and gain of electrons. This means that a specie looses electrons and other species gain electrons.

This loss and gain of electrons ultimately result in a change in oxidation number of chemical species from left to right in the reaction equation.

Now let us look at the specific case that we are considering;

2Ca(s) + O2(g) >2CaO(s)

We can see that the change in oxidation number of calcium from left to right is 0 to +2 while the change in the oxidation number of oxygen from left to right is 0 to -2.

Hence calcium is oxidized and oxygen is reduced. This is a redox reaction indeed!

if you mean hydrogen and oxygen then water is the product

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.