/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q9P Material balance. If you intend ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 26: Q9P (page 746)

Material balance. If you intend to measure all the anions and cations in an unknown, one sanity check on your results is that the total positive charge should equal the total negative charge. The table lists concentrations of anions and cations measured in pond water in an undergraduate experiment and expressed in mg/mL.

Find the total concentration of negative and positive charge (mol/L) to assess the quality of the analysis. What do you conclude about this analysis?

Short Answer

Expert verified

The total concentration of negative and positive charge (mol/L) is as follows:

Total cation charge: 0.00202M

Total anion charge: -0.00159M

Step by step solution

01

Calculate the concentration by using equation:

c(species;mol/L)=-valuefromspreadsheetmolar-mass炉(of)anion/cation脳10-6/10-3c(totalconcentration)=鈭�(species;mol/L)

02

Calculation of values

From the above equation we conclude that

Total cation charge: 0.00202M

Total anion charge: -0.00159M

03

Analysis

From this we can conclude that some concentrations can be inaccurate, or some ionic species were not detected.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

(a) A particular solution in a particular capillary has an electroosmotic mobility of 1.3脳10-8m2/(V脳s)atpH2and 8.1 10-8m2/(V脳s). How long will it take a neutral solute to travel 52 cm from the injector to the detector if 27 kV is applied across the 62-cm-long capillary tube at pH 2? At pH 12?(b) An analyte anion has an electrophoretic mobility of -1.6脳10-8m2/(V脳s)How long will it take to reach the detector at pH 2?At pH 12?

(a) The interstitial volume, V0, in Figure 26-15 is the volume at which the curves rise vertically at the left. FindV0for the 25-nm-pore-size column. To the nearest order of magnitude, what is the smallest molecular mass of molecules excluded from this column? (b) What is the molecular mass of molecules eluted at 9.7 mL from the 12.5-nm column? (c)Vmis the volume at which the curves drop vertically at the right. Find the largest molecular mass that can freely enter the 45-nm pores.

Low iron concentration (as low as 0.02nM) in the open ocean limits phytoplankton growth. Preconcentration is required to determine such low concentrations. Tracefrom a large volume of seawater is concentrated onto achelating resin column. The column is then rinsed with 10mLof 1.5M high-purity water and eluted withofhigh-purityHNO3.

(a) For each sample, seawater is passed through the column for 17hours at 10mL/min. How much is the concentration of Fe3+in the 10mLof NHO3eluate increased by this preconcentration procedure?

(b) What is the concentration of Fe3+in the seawater when 57 nm Fe3+is found in the nitric acid eluate?

(c) Reagent-grade concentrated nitric acid is 15.7 M and contains 鈮�0.2ppm iron. What would be the apparent concentration of Fe (nM) in a seawater blank if reagent-grade acid were used to prepare the 1.5M HNO3eluent?

(a) State the purpose of the separator and suppressor in suppressed ion chromatography. For cation chromatography, why is the suppressor an anion-exchange membrane?

Blue Dextran 2000 was eluted during gel filtration in a volume of 36.4mL from a 40 * 2cm (length diameter) column of Sephadex G-50, which fractionates molecules in the molecular mass range 1500-30000.

(a) At what retention volume would hemoglobin (molecular mass 64000 ) be expected?

(b) Suppose that radioactiveNaCI22, which is not adsorbed on the column, is eluted in a volume of 109.8 mL. What would be the retention volume of a molecule with Kav= 0.65?
See all solutions

Recommended explanations on Chemistry Textbooks

Making Measurements

Read Explanation

Physical Chemistry

Read Explanation

Chemical Reactions

Read Explanation

The Earths Atmosphere

Read Explanation

Inorganic Chemistry

Read Explanation

Nuclear Chemistry

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.