Please explain to me how to find the blank boxes. This is for an experiment that titrated an antacid tablet (mass of solid=500 mg) containing the base CaCO3 dissolved in 50 mL of 0.30 M HCl. Then a burette was filled to the 0 mark of a burette (so 50 mL in the burette) of 0.30 M NaOH and the NaOH was titrated into the HCl solution containing the antacid tablet.

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.