Will i use equivalent weight here?

Question

If 40 mL 0.1000 H2SO4 was used to convert all CO3 2- to H2CO3, how much HCl is needed to convert that same amount of CO3 2-?

>_< OMG

Answer 1

since you are working with normality, you will use the same amount of 0.1 Normal HCl as you would use 0.1 N H2SO4

normality tells you the # of moles of H+ / litre, (when you have an acid).

&amp; a 0.1 Normal solution of either will hve o.1 moles / litre

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you would have used twice the amount of HCl if you had been given Molarity, because it only has 1 H+ that it can release

2HCl &amp; 1 CO3-2 --&gt; H2CO3 &amp; 2 Cl- --&gt; H2O &amp; CO2 &amp; 2Cl-

1 H2SO4 &amp; 1 CO3-2 --&gt; H2CO3 &amp; SO4)2- --&gt; H2O &amp; CO2 &amp; SO4)2-