Question

1. Write the balanced equation for the reaction between calcium carbonate and hydrochloric acid in water, generating aqueous calcium chloride and liberating carbon dioxide gas. (You will need this for Part 1 of the experiment!) 2. Calculate the concentration of one liter of the resulting calcium chloride solution (assuming you started with 102.7 mg of calcium carbonate) in units of molar and millimolar. Also calculate the concentration in "parts-per-million as CaCO3". (Refer to section 13.5 of your textbook, if needed.) 3. In Part 1 of the experiment (preparation of Ca²+ (aq) solution of known concentration), the volumes of water used in steps 1, 2, 3, and 5 are all approximate. Why doesn't it matter that these volumes are approximate rather than accurately measured? (Be specific.) 4. If a standard Ca solution is 100 ppm and 50 mL of solution is used for the standardization, calculate the approximate volume of 2.5 mM EDTA solution needed to reach the end point of the titration. 5. As you can see in the structure above, top of page 4), the indicator EBT has two dissociable protons (H') on hydroxide groups (-OH); they are weak acids and both of their pK, values are around -10. Likewise, EDTA has four dissociable protons and the associated values for pKare 2.0, 2.7.6.2, and 10.3. Which protons are more acidic - those on EBT or those on EDTA? This experiment will be conducted in buffer near pH = 10. Are the protons for EBT mostly dissociated or undissociated at this pH? What about the protons for EDTA? 6. Read the procedure carefully and prepare your laboratory notebook with appropriate tables for collecting the data and making observations.

Answer 1

Hello, i am sorry to say that as per Chegg guidelines experts can answer only one full question that too first question only. I request you to please post remaining question as separate one since my allotted time could not permit me to answer more than one question also. Thank you in advance for your continued support to us.

I am gonna answer 1st question now!

Because remaining questions require some pages from (Q2 require section 13.5) your text book for example Q4 require top of page 4

Although answering these entire questions require more time than allotted, in general experts won't spend such a long time for a question

Balanced chemical equation between calcium carbonate and hydrochloric acid yielding aqueous calcium chloride, water and carbon dioxide gas is

2 HCl (aq) + CaCO3 (aq) => CaCl2 (aq) + H2O (l) + CO2 (g)

Hope this helped you!

Thank You So Much!

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