KHP + NaOH—> KNaP +H2O Data of trial Mass of KHP : 0.8085 Initial buret containing NaOH reading: 0.01ml Final buret containing NaOH reading : 37.00ml ml of NaOH used: 37.00 Question 1) calculate the molarity of NaOH
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- Indicate the appropriate protocol below to prepare the required solution. a) Solution 5 Preparation: Prepare: 10 mL of 23% mannitol From: solid mannitol Procedure: b) Solution 2 Preparation: Prepare: 0.5 liters of 0.01 mg/mL ascorbic acid From: solid ascorbic acid , MW = 176.1 g/mol Procedure: C) Solution 3 Preparation: Prepare: 1 liter of 150 mM Tris From: 1 Molar Tris stock solution Procedure:Calculate volume of H2 at 0 degress C, 2.00atm, from 275mL of 0.725M HCl and 4.50g Mg. Mg + 2HCl =MgCl2 + H2A 20 mL vial contains 202 mg of ammonium chloride. What is the concentration of the solution in mOsm/L? Round answer to one decimal place, do not enter units Cation Formula Valence Formula weight Anion Formula Valence Formula weight Aluminum Al3+ 27 Acetate C,H;O; 1 59 Ammonium NH,+ 1 18 Bicarbonate HCO; 1 61 Calcium Ca2+ 40 Carbonate Co32- 2 60 Ferric Fe3+ 3 56 Chloride Cl- 1 35.5 Ferrous Fe2+ 56 Citrate CH;0,3- 3 189 Lithium Lit 1 7 Gluconate CH110; 1 195 Magnesium Mg2+ 2 24 Hydroxide OH- 1 17 Potassium K+ 39 Lactate CgH;0; 1 89 Sodium Nat 1 23 Phosphate, H,PO, 1 97 monobasic Phosphate HPO,2- 2 96 dibasic Sulfate so,2- 96
- The following table gives the concentration of norepinephrine ( mol per gram creatinine) in the urine of healthy volunteers in their early twenties. (show complete solution) follow up question: Is there any evidence that concentration of norepinephrine differs between thesexes?9:08 81% 0 | Zain JO +962 7 9553 4231 قبل 9 دقائق Calculate the volume in (mL) required to prepare 50.0 ml that are 0.0535 M in NO, from a 7.88%(w/w) Fe(NO,), (241.81 g/mol) solution which has a density of 1.263 g/mL. Select one: а. 26.4 b. 30.1 C. 19.9 d. 6.5 e. 13.0 O O DGive only typing answer with explanation and conclusion How many mg of NaCl is needed to make 15 mL of a 1% solution of naphazoline HCl isotonic with tears? (naphazoline HCl ΔTf1%=0.16°C) Report numerical answer rounded to a whole number.
- For a solution containing 0.050 M sodium butanoate (the sodium salt of butanoic acid, butanoic acid can be found in appendix G). Calculate the fraction of association A)0.011%B)1.84%C)5.25%D)3.09%E)0.008% Do not give handwriting solution.Paired Exercise 14.27 What will the molarity be of the resulting solutions made by mixing the following? Assume that volumes are additive. (a) 143 mL of 4.9 M H3PO4 with 779 mL of H20 the tolerance is +/-2% (b) 225 mL of 0.60 M Na2SO4 with 741 mL of H20 M the tolerance is +/-2% (c) 75 mL of 0.50 M HNO3 with 75 mL of 1.5 M HNO3 M the tolerance is +/-2%Molecular weight is an example of an additive property of a compound. O True False When non-volatile solute is combined with a volatile solvent, the vapor above the solution is provided solely by the solvent. O True False ●
- A 84.0 mg sample of Red 40 dye was dissolved and diluted to a final volume of 0.750L with deionized water. What is the concentration of the Red 40 dye solution in ppm? -parts per million (ppm) refers to 1mg of solute in 1.0L of solution; (mg/L) 112 ppm is the answer. ( pleaae show how to calculate this problem)101 Bb UTF-8"Lab%205-%20PI x Bb UTF-8"Lab%202-%20st Bb UTF-8"Lab%201-%20SCX I https://mssu.yellowdig x Question 4 of 34 If you have 155 mL solution of a 0.762M FeCl solution, how many moles of FeCl, are contained in this sample? mlsetuton ADD FACTOR DELETE ANSWER RESET *( ) 1 1000 162.2 10 35.45 6.60 55.85 0.01 12.6 0.203 100 0.118 0.1 0.001 155 4.92 0.762 19.2 11.8 118What are the respective concentrations (M) of Cu2+ and Cl- afforded by dissolving 0.637mol0.637mol CuCl2 in water and diluting to 289mL?289mL? What are the respective concentrations (M) of Cu2+ and Cl- afforded by dissolving CuCl2 in water and diluting to 0.454 and 0.092 2.20 and 2.20 2.20 and 4.41 0.00220 and 0.00220 0.00220 and 2.20