Carbonic acid (H2CO3) is a weak diprotic acid with
Ka1=4.43×10−7 and Ka2=4.73×10−11. When sodium
bicarbonate (NaHCO3) is...
60.1K
Verified Solution
Link Copied!
Question
Chemistry
Carbonic acid (H2CO3) is a weak diprotic acid withKa1=4.43×10−7 and Ka2=4.73×10−11. When sodiumbicarbonate (NaHCO3) is titrated with hydrochloric acid (HCl), itacts as a weak base according to the equation
NaHCO3(aq)+HCl(aq)→H2CO3(aq)+NaCl(aq)
Suitable indicators are those that change color within the pHrange for the equivalence point of a specific titration. Theexpected pH at the equivalence point can be calculated usingpKa values. Suitable indicators for use in titratingcarbonic acid or carbonate solutions are methyl orange andphenolphthalein.
Part A
What volume of 0.130 M HCl is required for the completeneutralization of 2.00 g of NaHCO3(sodium bicarbonate)?
What volume of 0.170 M HCl is required for the completeneutralization of 1.50 g of Na2CO3(sodium carbonate)?
A sample of NaOH (sodium hydroxide) contains a small amount ofNa2CO3 (sodium carbonate). For titration to the phenolphthaleinendpoint, 0.190 g of this sample requires 23.98 mL of 0.100MHCl. An additional 0.700 mL of 0.100 M HCl isrequired to reach the methyl orange endpoint. What is thepercentage of Na2CO3 by mass in the sample?
Answer & Explanation
Solved by verified expert
4.3 Ratings (1066 Votes)
What volume of 0130 M HCl is required for the complete neutralization of 200 g of NaHCO3sodium bicarbonate NaHCO3aq HCl aq NaClaq H2CO3aq First calculate the moles of NaHCO3 in 200 g Number of moles amount in g molar mass 200 g 84007 g mole 0024 moles NaHCO3 and HCl Reacted in 11 therefore the moles of HCl are 0024 moles Molarity number
See Answer
Get Answers to Unlimited Questions
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
Membership Benefits:
Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
