6. A sample of hydrochloric acid is standardized using sodium bicarbonate. Write the balanced chemical equation for the reaction of hydrochloric acid with sodium bi- carbonate, NaHCO,. a. ment Calculate the molar concentration of the hydrochloric acid if 35.18 mL of hydrochloric acid was required to neutralize 0.450 g of sodium bicarbonate to a phenolphthalein end point. c. Calculate the mass percent concentration of hydrochloric acid using the molar concentration calculated in part b and assuming the density of the solution is 1.01 g/mL. с.

A 25.00 mL sample of H3PO4 solution is neutralized by exactly 54.93 mL of 0.04345 M Ca(OH)2. What is the molarity of the H3PO4 solution? O a. 0.1432 M O b.0.09546 M Oc. 0.0636 M O d.0.2148 M O e.0.2897 M

4. A 25.00 mL sample of a weak acid HX is titrated with 0.1250 M NaOH. The equivalence point in the titration occurs when 19.91 mL of the NaOH solution has been added. Neutralization reaction: HX + NaOH → NaX + H₂O Please answer the following questions. A. B. Based on the volume of 0.1250 M NaOH required to reach the equivalence point, calculate the concentration of the weak acid HX in the original 25.00 mL sample. M D. Please provider your answer below. 0² 0, (0) Check answer Determine the concentration of HX in the solution after the 10.00 mL of 0.1250 M NaOH has been added to the original 25.00 mL of weak acid sample in the titration. Please provider your answer below. 号 (0) Check answer Check answer C. Determine the concentration of NaX in the solution after the 10.00 mL of 0.1250 M NaOH has been added to the original 25.00 mL of weak acid sample in the titration. Please provider your answer below. 0₂ ← A ← Check answer $ ← → ← $ Given that Ka = 4.72x10-8 for the weak acid HX,…

D * Question Completion Status: Moving to the next question prevents changes to this answer. Question 1 D 5 points What is the percent of CaCO3 in an antacid given that a tablet that weighed 1.3198 g reacted with 50.00 mL of 0.4486 N HCI that subsequently required 3.72 mL of 0.1277 N NaOH for back titration? NB. Write the only value without units, eg: If the correct answer is 5.5%, write 5.5. A Moving to the next question prevents changes to this answer. MECER 6 Question 1 of 27 ENG US Save Answer Question 1 of 27 > 14:29 2022/10/05