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Mass solute needed to prepare 0.500L of 0.2 M NaCO3 from a solid NaCO3 with a purity of 92.0wt%
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- Prepare 0.1 M solutions of NaOH and 0.1 M ethyl acetate using high-purity distilled water. So, weight desired amount of NaOH and ethyl acetate and dissolved in dH2O to prepare stock solution in equal molarity. Mw (NaOH) = 40.0 g/mol , Mw (EtOAc)= 88.1 g/mol, Density(EtOAc): 0.898 g/cm3Prepare 0.1N H2SO4 solution of 250ml volume. (Density of H2SO4 is 1.84 and purity is 98 %)What is the mole fraction of CH3COOH in a solution containing 1.50 g CH3COOH (FM= 60.053 g/mol) and 1000.0 g H2O (density=1.00 g/mL)?
- A salt solution (30% Na2CO3) weighing 1ton iscooled to 20C where the salt crystallizes asdecahydrate. What will be the crystal yield ifthe solubility is 21.5 kg anhydrous Na2CO3/100kg water? (assume that 3% of the totalsolution is lost by evaporation)A 690 g of 59% strontium bromide solution is cooled from 60 oC to a certain temperature. Upon addition of around 2 g of strontium bromide, excess solute above saturation started to crystallize. Total recovered crystals is 146.003 g. How many solute is initially dissolved?A stock solution of 75% v/v ethanol was diluted with distilled water to prepare 1L of 42% v/v ethanol. (Density of ethanol = 0.789 g/mL; MW of ethanol = 46 g/mol). What is the molarity of 10.0 mL of 75% v/v ethanol?
- What volume of 10 ma/m % KOH solution is needed (with a density of 1.09 g/cm3) toneutralize 25 cm3 15 m/v % acetic acid solution?MM [CH3COOH] = 60 g/molMM [KOH] = 56.1 g/molA standard solution of NaOH as prepared by dissolving 4g of the solute in 250cm3. A) determine the molarity of the solution B) Calculate the volume of water required to dilute 100cm3 of the solution to the concentration of 0.25mol/dm3Fill out the following table based when increments of 0.15 grams of alum are added into a 100 mL saturated gypsum solution: Mass of alum added (g) Moles of alum added (mol) Molarity of Ca2+ in the saturated gypsum solution (mol/L) Molarity of Al3+ (mol/L) Molarity of SO42-from saturated gypsum solution (mol/L) Molarity of SO42- from alum(mol/L) 0.15 g 0.30 g
- 50.0 mL of a 0.60 M solution of pyridine in ethanol is to be prepared by measuring out a known volume of pure liquid pyridine and diluting to 500 mL with ethanol. The molar mass of pyridine is 79.1 g/mol, and its density at room temperature is 0.982 g/mL. What volume of pyridine is required for this solution?How many moles of solute particles are present in 1.64 mL of 0.458 M K2SO4? (the answer is 2.25E-3 but i would appreciate some insight on what steps to take!)What is the proof strength of a bottle of liquor labeled as 75.5% by volume?
