### Explain columetric flask and the colume made up

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3.953g of egg shell was reacteed with 50ml of 0.1 mol/l hcl and shel contains ca2co3 after all the sheell reacted resultign solution was placed in a columetric flask and th colume made up to be 100ml. 10ml of this reacted exactly with 12.65ml of 0.1 mol/l of naoh.how do u find the mass of ca2co3 in the eggshell

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