A 0.7500-g sample of pure KHP (Fwt=204.2g/mol) was dissolved and titrated with 35.0 mL of NaOH. The end point was overstepped and it was necessary to backtitrate with 3.50 mL HCl. Calculate the molarity of NaOH and HCl if the ratio is 30.0 mL NaOH to 25.0 mL HCl. Approximately 6 mL of conc.perchloric acid ( 72% ) was transferred to a bottle and diluted with about 1 liter of water. A sample containing 251.5 mg of primary standard Na2B4O7.10H2O required 27.41 mL of the HClO4 solution to reach the methyl red end point. What is the molar concentration of the HClO4 solution? (Fwt.= 382g/mol) Na2B4O7.10H2O + HClO4 ------------> NaClO4 H2B4O7.10H2O A 1.900-g sample is analyzed for benzoic acid content. The sample was dissolved and diluted to the mark using a 500-mL volumetric flask. A 30.0mL aliquot required 5.00mL of 0.1575M NaOH solution. Calculate the %(w/w) benzoic acid (Fwt=122) in the sample. C6H5COOH + NaOH -------------> C6H5COONa + HOH In one experiment, 0.0995M HCl was used to analyze soda ash and the following data were obtained: Mass of Na2CO30.2980 gInitial reading of HCl0.20mLFinal reading of HCl20.00mL What is the net volume in liters of HCl used? How many moles of Na2CO3 was used in the analysis? What is the corresponding Normality of the HCl used? What is the percent Na2CO3 in the soda ash sample?

“Since you have asked multiple questions, we will solve the first question for you. If you want any…

Answered: A 0.7500-g sample of pure KHP…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Concept explainers

Question

A 0.7500-g sample of pure KHP (Fwt=204.2g/mol) was dissolved and titrated with 35.0 mL of NaOH. The end point was overstepped and it was necessary to backtitrate with 3.50 mL HCl. Calculate the molarity of NaOH and HCl if the ratio is 30.0 mL NaOH to 25.0 mL HCl.

Approximately 6 mL of conc.perchloric acid ( 72% ) was transferred to a bottle and diluted with about 1 liter of water. A sample containing 251.5 mg of primary standard Na₂B₄O₇.10H₂O required 27.41 mL of the HClO₄ solution to reach the methyl red end point. What is the molar concentration of the HClO₄ solution? (Fwt.= 382g/mol)

Na₂B₄O₇.10H₂O + HClO₄ ------------> NaClO₄ H₂B₄O₇.10H₂O

A 1.900-g sample is analyzed for benzoic acid content. The sample was dissolved and diluted to the mark using a 500-mL volumetric flask. A 30.0mL aliquot required 5.00mL of 0.1575M NaOH solution. Calculate the %(w/w) benzoic acid (Fwt=122) in the sample.

C₆H₅COOH + NaOH -------------> C₆H₅COONa + HOH

In one experiment, 0.0995M HCl was used to analyze soda ash and the following data were obtained:

Mass of Na₂CO₃	0.2980 g
Initial reading of HCl	0.20mL
Final reading of HCl	20.00mL

What is the net volume in liters of HCl used?

How many moles of Na₂CO₃ was used in the analysis?

What is the corresponding Normality of the HCl used?

What is the percent Na₂CO₃ in the soda ash sample?

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions