does the relative amount of CaCO3 in each test tube agree with the calculated th

Question

does the relative amount of CaCO3 in each test tube agree with the calculated theoretical yield for CaCO3 5) (5) ()-(lative to the amount formed in test tube no. 1. Amount of CaCO3(s) precipitate formed relative to the amount formed in test tube no. 3 Relative Amount of CaCO,(s) a. Test tube no. I 36 b. Test tube no. 2 LO c. Test tube no. 3 d. Test tube no.4 0.5 e. Test tube no.5 0. f. Test tube no. 6 Lo- Analysis 1. Complete the following table (I mmo ' mol) Tube Concentration of Na,CO, in 5 mL CaCL, in 5 mLTheoretical Excess Excess of Solution in of Solution in Yield CaCo, in CO in Ca-in mmol mmol Na,CO, CaCi, 1 1.0 M 1.0 M 2 1.0 M 0.5 M mmol mmol mmol 5 0.5 M 0.1 M 3.5mmo 60.5 M 005 LG 2. Does the relative amount of Caco,)observed in each test tube agree with the calculated theoretical mol yield for CaCO,()? 108

Explanation / Answer

given that observation is relative to the test tube 3

if we fill the table with calculated theoritical yields we get

tube 1 =5

tube 2=2.5

tube 3=2.5

tube 4=2.5

tube 5=0.5

tube 6=0.25

for tube 3 it is given observed value as 1 and calculated we are getting as 2.5

so taking it as reference

for tube 1 we have theoritical value doble of tube 3 but observed is 3.5 which is 3.5 times tube 3 so it is not agreeble

for tube 2 we have theoritical value same as tube 3 and observed value also same as tube 3 so it is agreeble

for tube 4 wehve theoritical value same as tube 3 and observed value half of tube 3 it is also agreble because observed value should be <=calculated value (observed may have some losses due to practical factors)

for tube 5 we have theoritical value half of tube 3 and observed value 0.4 times tube 3 so it is agreeble because observed is less than calculated

for tube 6 we have theoritical value 0.1 times tube 3 and observed value 0.2 times tube 3 so it is not agreeble because observed value is more than theoritical value

so main logic is it is agreeble if

theoritical or calculated value is greater than observed value

not agreeble if

observed value is greater than theoritical or calculated value

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