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2HCl(aq) + CO3(aq) What kind of reaction is this? H₂CO3(aq) + 2Cl(aq) If you said this was a precipitation reaction, enter the chemical formula of the precipitate. If you said this was an acid-base reaction, enter the chemical formula of the reactant that is acting as the base. If you said this was a redox reaction, enter the chemical symbol of the element that is oxidized. Calculate the mass percent of CaCO3 in the sample. Be sure your answer has the correct number of significant digits. Oprecipitation O acid-base O redox 0 0 0 0% 4 X G x10

2HCl(aq) + CO3(aq) What kind of reaction is this? H₂CO3(aq) + 2Cl(aq) If you said this was a precipitation reaction, enter the chemical formula of the precipitate. If you said this was an acid-base reaction, enter the chemical formula of the reactant that is acting as the base. If you said this was a redox reaction, enter the chemical symbol of the element that is oxidized. Calculate the mass percent of CaCO3 in the sample. Be sure your answer has the correct number of significant digits. Oprecipitation O acid-base O redox 0 0 0 0% 4 X G x10

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter12: Solutions
Section: Chapter Questions
Problem 12.107QE
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Question

To measure the amount of calcium carbonate 

CaCO3

 in a seashell, an analytical chemist crushes a 

4.200g

 sample of the shell to a fine powder and titrates it to the endpoint with 

179.mL

 of 

0.370M

 hydrogen chloride 

HCl

 solution.

The balanced chemical equation for the reaction is:

→+2HClaq  CO2−3aq + H2CO3aq  2Cl−aq
What kind of reaction is this?
 
precipitation
 
 
acid-base
 
 
redox
 
If you said this was a precipitation reaction, enter the chemical formula of the precipitate.
 
If you said this was an acid-base reaction, enter the chemical formula of the reactant that is acting as the base.
 
If you said this was a redox reaction, enter the chemical symbol of the element that is oxidized.
 
Calculate the mass percent of 
CaCO3
 in the sample. Be sure your answer has the correct number of significant digits.
%
 
 
 
To measure the amount of calcium carbonate (CaCO3) in a seashell, an analytical chemist crushes a 4.200 g sample of the shell to a fine powder and titrates it to the endpoint with 179. mL of 0.370M hydrogen chloride (HCI) solution. The balanced chemical equation for the reaction is: 2HCl(aq) + CO² (aq) What kind of reaction is this? H₂CO3(aq) + 2Cl¯ (aq) If you said this was a precipitation reaction, enter the chemical formula of the precipitate. If you said this was an acid-base reaction, enter the chemical formula of the reactant that is acting as the base. If you said this was a redox reaction, enter the chemical symbol of the element that is oxidized. Calculate the mass percent of CaCO3 in the sample. Be sure your answer has the correct number of significant digits. Oprecipitation acid-base redox 0 0 0 0% X Ś
Transcribed Image Text:To measure the amount of calcium carbonate (CaCO3) in a seashell, an analytical chemist crushes a 4.200 g sample of the shell to a fine powder and titrates it to the endpoint with 179. mL of 0.370M hydrogen chloride (HCI) solution. The balanced chemical equation for the reaction is: 2HCl(aq) + CO² (aq) What kind of reaction is this? H₂CO3(aq) + 2Cl¯ (aq) If you said this was a precipitation reaction, enter the chemical formula of the precipitate. If you said this was an acid-base reaction, enter the chemical formula of the reactant that is acting as the base. If you said this was a redox reaction, enter the chemical symbol of the element that is oxidized. Calculate the mass percent of CaCO3 in the sample. Be sure your answer has the correct number of significant digits. Oprecipitation acid-base redox 0 0 0 0% X Ś
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