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- Post Lab Questions 1 A student performed a freezing point determination for a solution with the following results. mass of unknown = 1.982g mass of water = 19.69g freezing point of water = %3D %3D Time Time Temp (deg C) Time Temp Time Temp (min) (deg C) (deaC) (min) (min) (min)25mL 10% Na04 salution ? mmol theo mmoldikenzalacetone theo mass divemaaletone mass recovered 1 mmol 26g benzaldehyde. ? ML 2 mmol 7. 0.8mL acetone 2 mmol4 ab Would you expect F₂ to be soluble in CBr4 or not? FULLY explain your answer. Edit Format Table esc s lock 12pt Paragraph p A 2 N BIUAV V T²V 3 W E S D X R % 5 F T CV 岬く描く MacBook Pro A 6 Y & B 7 G H G O words * 88 8 N J J
- 5. The mineral analysis below was reported for a water sample. Calcium 90 Chloride 120 Magnesium 30 Sulfate 170 Iron (Fe**) 5 Bicarbonate 165 Sodium 10 pH 7.5 units Potassium 6. Note: All reported as "mg/L as the ion" unless stated otherwise. Draw a bar chart that includes all the ions listed above. (Remember to convert to appropriate units) b. What is the total hardness of the water using ALL multivalent cations in mg/L as а. CACO3? c. What is the total hardness of the water using the predominant polyvalent cations in mg/L as CaCO3? d. What is the percent error in using only the predominant polyvalent cations? e. What is the carbonate hardness of the water in mg/L as CaCO3? f. What is the non-carbonate hardness of the water in mg/L as CACO3?Biological studies have found that aqueous solutions containing as little as 28 µg of allicin per milliliter inhibit bacterial growth. Express this amount as the number of moles of allicin per liter of solution. \(28~\text{ug/mL}=\) \(text{mol/L}\) 20 F3 II F8 F4 F5 F6 F7 F9 F10 F11 F12 & %24 4. 3 5 7 9 { } P E T Y U %3D * CO R %23Just needing help on part b please.
- I need help with this question please! Use dimensional analysis please!?number 15 (POST) please answer A&B ! thank you!Question 5 In Step 8 (see below, as well as in the presentation), three different slimes were prepared by adding different amounts of borax solution. Which of the following statements is/are correct? Step 8: Prepare the following slimes and evaluate their properties Sample 1 3 PVA solution 40 mL 40 mL 40 mL Borax solution 10 mL 5 mL 1 mL Deionized water O mL 5 mL 9 mL Breaking length Bounce height 30cm 70cm NA 5cm 10cm NA O The more borax we add, the more rigid the slime will become. O The less borax we add, the less elastic the slime will become. O The change in its properties is due to the added amount of water which will affect the structure of the slime. O The water is added in order to have the same final volume of reactants.
- For results/conclusions Using the images attached Write 2 paragraphs 1st paragraph: Starts with Objective. Results of DeltaT and i stated 2nd paragraph: sources of errors discussed The objective is The colligative properties are the properties that undergo a change when a solute is introduced to a solvent. Freezing point depression is also a colligative property. The addition of a solute to a solvent reduces the freezing point of the resulting solution. The freezing point of the solution is always lower than the freezing point of the solvent. This difference in the freezing point between solvent and solution is called freezing point depression. The freezing point depression is directly proportional to the molality of the solution or the number of moles of solute present in the solution.Solvent Isotonic Hypertonic Hypotonic What is Iodine used to detect? Describe the assay/test. What is silver nitrate used to detect? Describe the assay/testIZVW @ ol:09 zain IQ li. How many millilitres of concentrated sulphuric acid, 99.0%, density 1.831 g/cm3, are required to prepare 0.6 liter of a 0.2 M solution? Note ( M.wt of sulphuric acid = 98.1 g/mol) * %3D 5.7 ml 18.4 ml 6.5 ml 17.5 ml prepare a standard solution of a potassium Chloride (KCI), 0.3 N in 500 ml of water. (atomic weight : K=19 , Cl=35 ) ? * 1.8 gm 8.1 gm 81 gm 0.81 gm docs.google.com a