ml Diluted Undiluted Diluted to mL Water Absorbance Unknown Conc. (M) Conc. (M) 0.5 4.5 0.4IS 1.25 3.750.472 2.S 2.50.935 10% original 25% original 50% original 3.75 1.25 1.35 75% original 1.80 Undiluted average undiluted concentration =
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- Please create a caption for this table. Solution NaCl Conc. (%) Osmolality (mOsm) % transmittance Absorbance % hemolysis % crenation C distilled 0 0 0.001029 4.987584625 100 0.03354 1 0.177179111 54.61 0.001551 4.809388202 96.42720001 0.05837 2 0.297126222 91.58 0.01012 3.994819487 80.09527231 0.08444 3 0.442542222 136.4 3.849 1.414652089 28.3634704 0.134 4 0.590164444 181.9 64.8 0.188424994 3.777880643 0.2125 5 0.74752 230.4 95.64 0.019360433 0.388172513 0.3368 6 0.89644 276.3 99.56 0.001915112 0.038397585 0.5336 7 1.095648889 337.7 99.98 8.68676E-05 0.001741676 0.9834 8 1.336711111 412 100 0 0 2.1 9 1.755568889 541.1 100 0 0 7.9 10 2.674395556 824.3 100 0 0 57.83 11 4.490211111 1384 100 0 0 99.72Data Analysis: 1. Create an Absorbance (Y) vs. Concentration (X) graph using data from the six standard solutions above. 2. Perform a linear trendline analysis of your six data points. Display the equation and R² value on the graph with a minimum of 8 decimal places. 3. On the same graph, perform a 2nd order polynomial trendline analysis of your six data points. Display the equation and R² value on the graph with a minimum of 8 decimal places. 4. Turn in your graph as the last page of this report. 5. On a separate piece of paper calculate the concentration of the unknown solution using both the linear and 2nd order polynomial trendline equations (Show all work) 6. Choose the best unknown concentration from #4 above and report it with three significant figures in the unknown data table above.Q1: What is the density (g/ml) of a 3.6M Sulfuric acid solution that is 29% H,So, by mass (Mwt. = 98)? Q2: Fill the blanks with suitable answers 1: The is the thing being dissolved. ......... 2: The branches of quantitative analysis are and 3. The filterability of the precipitate depend on the of practices. Q3: Which one is correct? 1. Molality changes with temperatures. 2. Molality does not change with temperatures. 3. Molarity changes with temperatures. 4. Normality changes with temperatures. Q4: What weight of pyrite ore (impure FeS,) must be taken for analysis so that the BaSO, precipitate weight obtained will be equal to one-half that of the percent S in the sample? Note: Mwt. of Ba =32, Mwt. of BaSo4 =233, Mwt. of FeS, =119
- Density of solution:Trial 1: 1.2 g/mLTrial 2: 1.2 g/mLTrial 3: 1.2 g/mL Average density = 1.2 g/mL What is the relative average deviaion, %?25mL 10% Na04 salution ? mmol theo mmoldikenzalacetone theo mass divemaaletone mass recovered 1 mmol 26g benzaldehyde. ? ML 2 mmol 7. 0.8mL acetone 2 mmolZonasha Berrett concentrdion of 5.50mollL.what. A stock solution has a volune ef this stock Solution is required to melke (50.omL. of Solution with a concentration ef lrowmollL? (V2)=650.0ml CM2) =1.00 mb/L=l.00M Cvij =? CMIJ= s.50 ndlL Vi =118.2 mC %3D • • Volume of stock Solution required is ll8.2 mL
- Boil Go mL of distilled waiter in the Erlenmeyer flauk with small flame and take the tmporature The tmperature reeding is 98 -0°C the bulb of the Hhermometer must tuch the battom sides or of the Erlenmayer flaske. Dasolve 253gams q 10 urea in grams of distilled weiter Ertenmeyer another flask. forl the fout solution gontly ard reeord ite boiling point- Temperature veading isExample: What is the volume of HCl which is needed to prepare 100 ml of solution has 6 M conc. if you know the % of HCl equal 37 % sp.g was 1.18 g /ml. M=2%- 1000 M.wt. 1000 11.96 36.5 M,V M;V: - 6. 100 - 11.96. V: The volume will dilute to 100 ml(Preparation of 0.1 N HCI solution in 250 ml D.W) Procedure: Preparation of approximately (0.IN) HCI from 37% and 1.2 Sp.g • Calculate the Normality of the concentrated HCl from the law: To prepare (500ml) of 0.IN HCL: NI VI = N2 V2 NI x ? = 0.1 x 500 • Transfer some of distilled water to 500ml volumetric flask and add the calculated volume of conc. HCI. Mix the content thoroughly. Complete to the mark with distilled water and make a label.
- The following set of chloride on seperate all quots Of a pette pooled Serum obtaned from SMu chemistry lab here reporterd by (43) students : (03:106; (07 and 114 meqlL. analysis One value qppears suspect. Help these Students to determine if it can be ascribed to the acudental 95% Confidence level. error ot1. What mass of MC| is needed to make 3000g or 109 solution? (MW: H= 1 , Cl= 35)a. 0.09 gb. 90 gc. 900 g d. 0.9 g 2. Detemine the mole faction of the solvent in a solution prepared by dissolving: 36g of CH3OH in 1000 of H2O. a. 55.55molesb. 0.02molesc. 0 98molesd. None of the aboveConcentration of Acetic Acid in a Vinegar Solution. Average molarity of NaOH Volume HC₂H30₂ sample Final buret reading Initial buret reading Volume NaOH (Show all units and all calculations) Molarity of HC₂H30₂ (unrounded) Average molarity of HC₂H302 (unrounded) Deviations Average deviation Best estimate for molarity of HC₂H302 Average mass percent HC₂H302 46.4mL Oml Ran out of Base ↓ ↓ ↓ ↓ 10.014 HOA je beart giov isults weari?! ferottelucuny Cambia) 10 Kousad Question 1. A Rolaids tablet contains calcium carbonate that neutralizes stomach acid. If 44.55 mL of 0.448 M hydrochloric acid is required to neutralize one tablet, how many milligrams of calcium carbonate are in a Rolaids tablet? CaCO, (s) + 2HCl(aq) → CaCl₂ (aq) + H₂O (1) + CO₂ (g)
