Can you solve 1,2,3 as soon as possible UDU PuLai-Uld... G ODU blackboard-G.. LG

Question

Can you solve 1,2,3 as soon as possible UDU PuLai-Uld... G ODU blackboard-G.. LG TCC BLACKBOARD Other Book aber Armugia TCC Learn Library Help 2018 TC295.CHM.112.LO8C.SP18 Course Content Cumulative Quiz 1 uiz 1 Timelimitz 1 hour, 30 minutes 125:18 remaining D Show Intro/instructions ring the Absorption Spectroscopy lab yo estions. Do not use the "tips" but answer the questions to the correct number of significant figures 1. You have a sample of unknown concentration. The species you are evaluating has a molar absorbtivity is 4 320, the path length is analysis corre absorbance to concentration. Answer each of the following exactly 1 centimeter and the absorption is 0.157 calculate the concentration using the equ tion A 2. You create a calibration curve of Absorbance vs. Concentration using a set of standards. You calculate the trendline to be y 5.31 z + 0.86. If one of the solutions you are testing has a concentration of 0.0gs M what would you expect e as rtint be? corded to? 3. If you performed the above calculation correctly (for #2) how many decimals should your answer have been re emperature of the lab at the time the solution was made is 0.9926 g/mL Calculate the molarity, molality percent of the copper I sulfate (Cu2SO4) student makes a solution for analysis by mixing 6.9 grams of Co-5Ou into 282.8 grams of water. The density of water at the mole fraction, and mass 4. A 6.960

Explanation / Answer

1.A(absorbance)= e ( molar extiinction coeficient)b( path length)C( concentration), C= A/eb= 0.1570/1(4.320) M=0.036M

2. given A(absorbance)= 5.31* x(concentration )+0.086

given x=0.095M, A = 5.31*0.095+0.086=0.59

when accouning for all decimals, A=0.59045

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.