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- given the molar mass of of compound A as 327.34g/mol and the mass being 0.016g. calculate the concentration of compound A (the stock standard) if it is mixed with 50ml water then 2ml, 4ml and 6ml of the stock standard are measured into a 10ml volumetric flask. calculate the concentrations of the 2ml, 4ml and 6 ml solutions.What is the concentration of F— ions when 422.569 mg of MgF2 (62.3018 g/mol) completely dissociates in 1.361 L of water? Enter the numeric answer only in the units of mM (millimolar). Do not enter the unit.What is the percent magnesium hydroxide, if a sample of magnesia magma weighing 5.2430g when dissolved in 25 mL of 0.9915 N H2SO4 required 9.85 mL of 1.4102 N NaOH to titrate the excess acid? Round to 2 decimal point; Answer should be with the correct unit.
- You have a 0.05M stock solution of NaCI (Formula Weight: 58.4g/mole), a 0.25Mstock solution of glucose (Formula Weight; 180.2g/mole), and a bottle of solid Tris base (FormulaWeight: 121.1g/mole). How would prepare (be specific) 150mL of a single solution containing75mM Tris, 15mM glucose, and 5mM NaCl.A weight of 0.50 g was taken impure container containing sodium carbonate and bicarbonate. Dissolved in water and then crushed with hydrochloric acid (0.1 N), the burette reading game was at the endpoint of phenolphthalein of 10.5 ml and at the end point of the orange methylation point 30.1 ml. The percentage of sodium carbonate was in ................. knowing that the weights are: Na: 23, C: 12, O: 16please help solve Concentration of AR Stock Solution (ppmppm) 21.22 Unrounded Rounded Concentration of AR Stock Solution (μMμM) 42.7461 42.7
- A solution of sulfuric acid was made by dissolving 20.0g of 98% sulfuric acid in a 250mL of water. (H2SO4 = 98.078 g/mol; H2O = 18.015 g/mol)Additional information for 35-37 What if the solution has a total volume of 262ml? 1. Express the concentration of this solution in % by weight.a. 7.3%b. 4.4%c. 8.0%d. 7.8% 2. Express the concentration in molaritya. 0.10 Mb. 2.00 Mc. 0.76 Md. 0.93 M 3. Express the concentration in normalitya. 2.0 Nb. 1.5 Nc. 1.0 Nd. 0.76 N 4. Express the concentration in molalitya. 0.80 mb. 0.77 mc. 1.00 md. 1.50 mIf a student used the molar mass of magnesium to calculate the concentration in parts per million (ppm) of a manganese stock standard solution, would the reported weight percent of manganese in a subsequent unknown, that was compared colorimetrically, be higher, lower, or not change?Determine the percentage Fe in a sample of limonite from the following data:Sample : 0.5000g ; KMnO4 used = 50.00 ml ; 1.000ml of KMnO4 is equivalent 0.005317 g Fe,FeSO4 used = 6.00 ml; 1.000ml FeSO4 is equivalent 0.009200 g FeO ( ans 44.59 %)
- What weight of the soda ash (impure Na2CO3) should be taken for analysis in order that the number of milliliters of 0.500 N acid used will be equal to one-half of the percentage of Na2CO3 in the sample? Note: Please include the complete solution. Thanks!Use the follow data below and answer the following questions: Component Concentration (mg/L) CO2 8 Ca2+ 45 Mg2+ 13 Sr2+ 12 Alkalinity 270 Determine the quantity (mass flow) of CaO and Soda Ash using practical solubility limit required to treat hard water taking volumetric flow as 145000 L/d and pH of 7.5 and purity of both reagents as 97%.Which of the following is the gravimetric factor formula for the following pair of substances? FW stands for formula weight. Choices are attached below. Sought-for Constituent Substance Weighed ZnO Zn2P2O7