The ka of carbonic acid (h2co3) is 4.3 x 10–7. a solution of sodium hydrogen carbonate (nahco3) solution is created by dissolving 4.00 moles of sodium hydrogen carbonate in 2.00 l of aqueous solution. what is the ph of the solution at equilibrium?

Explanation:

It is given that pH of .

Now, molality of , M=

Now, we know,

          ...1

Here C is concentration.

Now,

Putting all values in equation 1.

We get,

Hence, this is the required solution.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms