What is the maximum amount of KCl that can dissolve in 200 g of water? (The solubility of KCl is 34 g/100 g H2O at 20mc002-1.jpg
2 answers:
Answer : The correct option is, (d) 68 g
Solution :
As we are given the solubility of KCl is 34 g/100 g water. Now we have to calculate the amount of KCl.
As, 100 grams of water contains 34 grams of KCl
So, 200 grams of water contains of KCl
Therefore, the maximum amount of KCl that can dissolve in 200 g of water is, 68 grams.
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Answer:
See explanation below
Explanation:
In this case, let's see both molecules per separate:
In the case of SeO₂ the central atom would be the Se. The Se has oxidation states of 2+, and 4+. In this molecule it's working with the 4+, while oxygen is working with the 2- state. Now, how do we know that Se is working with that state?, simply, let's do an equation for it. We know that this molecule has a formal charge of 0, so:
Se = x
O = -2
x + (-2)*2 = 0
x - 4 = 0
x = +4.
Therefore, Selenium is working with +4 state, the only way to bond this molecule is with a covalent bond, and in the case of the oxygen will be with double bond. See picture below.
In the case of CO₂ happens something similar. Carbon is working with +4 state, so in order to stabilize the charges, it has to be bonded with double bonds with both oxygens. The picture below shows.
