how can I calculate the mole ratio with the info I got in the lab. please help.
ID: 555564 • Letter: H
Question
how can I calculate the mole ratio with the info I got in the lab. please help. thanks
: Gogeles ONI tong har eied hackt Secure loose clothing! instructor iguazni, clean ert up ring-stand. wire mesh screen Dunsen burner as depicted in ,operly nght the nuroen burreras demonstrated by your of the 3 Heat ty leht thectd in Fgure 1 uagel deun evoporating dish, and Heat the evaporating dish e hottest part ning erucible tongs (to avoid oils from skinl. place the an che balance, add approximately 2.00 g Cuso, SH.O Record aporating dish with cuSO, SH,0 on the wire mesh and gently moving the burner back and forth. Increase the heat nately 3 minutes. low the evaporating dish to cool for several evapo rating dish on the balance and recard mass combined mass. dish by iy for approsimately 5 minutes or until all the blue color has figure 3 crospatula If edges of the solid start toa raduaiy. void any popping or spattering of salt nww.e. not topick uAmorospatula may be usedto spread the solid but be careful from he t momentarily and resume heating at gentler rate. not to pick up any hydrate on the m e coier is gone, turn off flame and let evaporating dish cool Mass the dish and anhydrous salt immediately once it is cool. the dish again for 3 minutes, cool and reweigh. To be sure all of the water has ber sowa ved you must have successive masses that are consistent if the mass of dish and salt we your reading in step as, then re-heat and reweigh until mass is constant. Men down from Mass (R) Evaporating dish atter heatin Evaporating dish+ Cuso. sH.O Evaporating dish + Cus0s after first heating Evaporating dish + Cuso, after second heating -vaporatingdish-Cusa afterthird heatingnecessary,- Calculations t. Mass of Cuso. SH originaly in disth Mass of anhydrous salt (CuSO.) remaining after heating Mass of water that was released during heating Based on lab data, calculate percent of water in hydrate Jsing molar masses, calculate the Actual Percent of water in Cuso 5 HO Calculate the Percent Error of water -o, 2 63.ssi 32.064 (1s.qq4)+5(axtoor : 635S 4 39.061 63.96+ 90.08 ter State University 1 D 4 5SExplanation / Answer
molar mass of CuSO4.5H2O = 249.68 g/mol
mass of water present = 5 x 18 = 90
% of water in copper sulphate = (90 x 100)/249.68 = 36.046 % (theoretical)
Experimental = 36 %
Percentage error = (36.046 - 36) x 100 / 36.046 = 0.128 %
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