In lab, scientists often use percentages to describe concentration. When making a solution, percentage can be expressed as weight overvolume (wt/vol) or as weight over weight (wt/wt). When expressing things as %(wt/w) it usually assumed that 1 mL of water = 1 gram ofwater. This is similar to assuming molarity (mol/L) equals molality (mol/kg)In lab, 70%(wt/vol) ethanol is frequently used to sanitize the lab þench or research tools such as forceps. In order to produce a finalvolume of 200 mL of 70%(wtvol) ethanol, how many mL of 99%(wt/vol) ethanol would you need to add?The percentages can be treated as a concentration. A solution that is 70% ethanol is 70 g of ethanol and 30 mL of water, or 70 g Ethanolout of 100 mL of solution. Therefore, it is possible to use m,v, = m,v2 and use the percentages as the concentration values.Report your answer rounded to two decimal places

We have to find volume needed to make solution

In lab, scientists often use percentages to describe concentration. When making a solution, percentage can be expressed as weight over volume (wt/vol) or as weight over weight (wt/wt). When expressing things as %(wt/wy it usually assumed that 1 mL of water = 1 gram of water. This is similar to assuming molarity (mol/L) equals molality (mol/kg) order to produce a final In lab, 70%(wt/vol) ethanol is frequently used to sanitize the lab pench or research tools such as forceps. volume of 200 mL of 70%(wt/vol) ethanol, how many ml of 99%(wt/vol) ethanol would you need to add? The percentages can be treated as a concentration. A solution that is 70% ethanol is 70 g of ethanol and 30 mL of water, or 70 g Ethanol out of 100 mL of solution. Therefore, it is possible to use m,v = m,v2 and use the percentages as the concentration values. Report your answer rounded to two decimal places

In lab, scientists often use percentages to describe concentration. When making a solution, percentage can be expressed as weight over volume (wt/vol) or as weight over weight (wt/wt). When expressing things as %(wt/wy it usually assumed that 1 mL of water = 1 gram of water. This is similar to assuming molarity (mol/L) equals molality (mol/kg) order to produce a final In lab, 70%(wt/vol) ethanol is frequently used to sanitize the lab pench or research tools such as forceps. volume of 200 mL of 70%(wt/vol) ethanol, how many ml of 99%(wt/vol) ethanol would you need to add? The percentages can be treated as a concentration. A solution that is 70% ethanol is 70 g of ethanol and 30 mL of water, or 70 g Ethanol out of 100 mL of solution. Therefore, it is possible to use m,v = m,v2 and use the percentages as the concentration values. Report your answer rounded to two decimal places

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter1: Basic Concepts Of Chemistry

Section: Chapter Questions

Problem 49RGQ: Fluoridation of city water supplies has been practiced in the United States for several decades. It...

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