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molar mass of CoCl2: 6 H2O = 237.99 g/mol : 1 mole of Cola: 6H2O =...
Data Analysis and Calculations PART B Preparing the Solutions and Cuvettes Mass of Cocl, 64,0:0.160 8 1 Determine the concentrations of Co?" and cl in the stock solution from the mass of CoC), 6 H, you measured Record your results in the space provided. Sample Calculation: Concentration of cobalt(II)ion in the Stock Cocl, Solution: [Co2+] = Concentration of chloride ion in the Stock CoCl, Solution: [CI") =
A solution made by dissolving 85.0 g f sucrose (Molar mass. 342.3 g/mol) in 515 go acetic acid at 25 degree C froze at 14.95degreeC. Freezing point of the pure acetic acid is 16.90degreeC.Density of acetic acid is 1.05 g/ml. at 25 degree C. Answer the following and show your work in the space provided. Molality of sucrose solution = K_i of acetic acid = 93.42 g of an unknown non-volatile, non-electrolyte solute was dissolved in 850.g of acetic acid....
A 1.000 L solution contains 0.5844 g NaCl (molar mass 58.44 g/mol) and 7.455 g KCl (molar mass 74.55 g/mol), both strong electrolytes. The concentration of Cl− ions in this solution is (A) 0.1000 mol/L (B) 0.1100 mol/L (C) 0.2000 mol/L (D) 1.000 mol/L (E) 1.100 mol/L
What would be for the mol reacted,, mol NH4X in sample, and yhr average molar mass? CALCULATIONS A. NaOH Preparation: Approximate molarity of NaOH 0.48 M B. NaOH Standardization: Trial # Mass of KHP E 1.7249 1.9569 1.8799 Volume of NaOH 18.58 L 20.58mLihat 19.71 mL Molarity of NaOH 0.4544 M 0.4654M 0. 3 M 0.4668M Average molarity of NaOH: 0.4668 M 0.4622 M C. Molar Mass of NH X Salt 1. Volume of NaOH 0.025 0.025 0.025L 2. Molarity...
Sugar is easily soluble in water and has a molar mass of 342.30 g/mol. What is the molar concentration of a 245.6 mL aqueous solution prepared with 78.3 g of sugar? Suppose you have 350.0 mL of a 0.450 M sodium hydroxide solution. How many moles of sodium hydroxide are in the solution? Calculate the percent by mass of a solution made from 17 g NaCl (the solute) and 67 g water. Suppose you need to prepare 141.5 mL of...
Ksp for Ag2CO3 (molar mass = 276 g/mol) is 3.50x10-6. Into a 100.00 mL saturated Ag2CO3 solution, 0.0200 mol of Na2CO3 solid is added. How many grams (3 sig fig) of solid will precipitate? (hint: find how many moles of Ag2CO3 is dissolved in pure water, and how many moles is dissolved in Na2CO3 solution. The difference is how many moles will precipitate out from solution.)
for question 1 the molar mass of unknown is 102g/mol hation by Freezing Point Depression Vernier Logger Pro for Windows Section Post-Laboratory Questions (Use the space provided and additional paper if necessary. Record your nemerical answers in the boxes provided.) 1. Obtain the correct molar mass of your unknown from your laboratory instructor. Calculate the percent error in the molar mass that you found. Torg/mol percent error, 2. A student determined the freezing point of pure t-butyl alcohol following the...
CHEM 110 Online Lab Instructions for Exp 6 Molar Masses as Conversion Factors Part 1: The Chemical Reaction LET'S WATCH THE BALLOON INFLATE Let us do a simple "chemical reaction and see what happens when these two common household chemicals are put together: vinegar (HC,H,O2 -aqueous acetic acid solution) and baking soda (NaHCO, --sodium bicarbonate). Vinegar is a solution of acetic acid and water. Vinegar is used in salad dressings, to dye eggs, and in other cooking uses. Baking soda...
1. The molar mass of the crystal violet powder is 407.99 g/mol. How many grams of crystal violet are needed to prepare 2.00 L solution with a concentration of 3.00 x 10'M? Mass of Crystal Violet (grams):
Please show work/explain: 1) The molar mass of succinic acid is 118.09g/mol. Suppose a 1.1519g sample of succinic acid is titrated with 25.95mL of 0.9913M NaOH solution. Is Succinic acid monoprotic/diprotic/triprotic or tetraprotic and why, show work. 2) 2C2H6(g)+7o2(g)→4co2(g)+6h2o(g) Standard Enthalpy is -3120.6kj/mol What mass of ethane must be combusted in order to heat 366g of water from 25.0C to 100.0C. ASsume the heat transfer is 100% efficient? 3) 2HCl + caco3 --> H20 + CO2 + CaCl2. Assuming the...