PRE-LAB 1. Predict the reaction products for the following antacids with stomach

Question

PRE-LAB 1. Predict the reaction products for the following antacids with stomach acid HCL Remember all neutralization reactions are double displacement reactions NallCO, (cheap antacid) CaCOs (Tunis) MglOH): (Milk of Magnesia) 2. What is the relative water solubility of each compound above? How would you know when any of the above reactions were completed? 4. For five different brands of antacids, complete the information below by making a trip to your local supermarket, drugstore or online. Brand Antacid Amount Tablet Price per 100 Tablets Name Partners . Calculate the volume (in milliliters) of stomach acid (0.020M HCT) that can be neutralized by the amount of antacid per tablet in each brand using the label amount.

Explanation / Answer

NaHCO3 + HCl ? NaCl + H2CO3

CaCO3 + 2HCl ? CaCl2 + H2CO3

Mg(OH)2 + 2HCl ? MgCl2 + 2H2O

All are water soluble.

NaHCO3 + H2O ? NaOH + H2CO3

CaCO3+ H2O ? Ca(OH)2 + H2CO3

Mg(OH)2 + H2O ? Mg + 2 H2O

Solubility increasing order : NaHCO3 > CaCO3 > Mg(OH)2

After completing the reaction, its pH will be 7 or neutralized. So the excess acidity by stomach acid HCl will be reduced, acidity will cure.

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