Calculate the molarity of the following solutions: a A sample of solid KBr weighing 18.0 g...
Calculate the concentration in % (w/w) of the following solutions: (a) A 10.0mL sample with a density of 1.10 g/ml leaves 1.18grams of solid residue when evaporated. (b) A 25.0gram sample of solution on evaporation leaves a 1.87grams residue of MgCl2. (Please show clear handwriting and step by step please) Thank you so much!!!
A student weighs out a 14.4 g sample of KBr, transfers it to a 500. mL volumetric flask, adds enough water to dissolve it and then adds water to the 500. mL tick mark. What is the molarity of potassium bromide in the resulting solution? Molarity = M
10. Volume of sample in liters 11. Molarity of NaCl solution (Show calculations.) Questions and Problems 05 A 15.0-ml sample of NaCl solution has a mass of 15.78 g. After the NaCl solu- tion is evaporated to dryness, the dry salt residue has a mass of 3.26 g. Calculate the following concentrations for the NaCl solution. a. % (m/m) b. % (m/v) c. molarity (M) Q6 How many grams of KI are in 25.0 mL of a 3.0% (m/v) KI...
Describe how you would prepare each of the following aqueous solutions, starting with solid KBr. 1] 0.70 L of 1.4×10−2 M KBr Express your answer using two significant figures. Enter your answers numerically separated by commas. 2] 120 g of 0.190 m KBr Enter your answers numerically separated by commas. 3] 1.70 L of a solution that is 14.0 % KBr by mass (the density of the solution is 1.10 g/mL) Enter your answers numerically separated by commas. 4] a...
A 1.04 g sample of KBr is dissolved in water to give 155 mL of solution. This solution is then added to 165 mL of 0.015 M aqueous Pb(NO3)2, in an attempt to remove the toxic lead(II) ions from the solution via precipitation as insoluble PbBr2(s). The precipitation reaction that occurs is: Pb2+ (aq) + 2 Br (aq) ---> PbBr2 (s) At the end of the reaction, what is the concentration (in molarity) of nitrate ions in the solution? Note:...
What is the molarity of a solution of HClO3 made from weighing 25.26 g of HCIO3 and dissolving it in enough water to make a total volume of 325.0 mL? Calculate the pH of this solution. Is it an acidic, basic, or neutral solution?
What is the molarity of a solution of HCIO3 made from weighing 55.26 g of HCIO3 and dissolving it in enough water to make a total volume of 325.0 mL? Calculate the pH of this solution. Is it an acidic, basic, or neutral solution?
What is the molarity of a solution of HCIO3 made from weighing 25.26 g of HCIO3 and dissolving it in enough water to make a total volume of 325.0 mL? Calculate the pH of this solution. Is it an acidic, basic, or neutral solution?
What is the molarity of a solution of HClO3 made from weighing 25.26 g of HClO3 and dissolving it in enough water to make a total volume of 325.0 mL? Calculate the pH of this solution. Is it an acidic, basic, or neutral solution?
Part A. caculate the molarity. 6.65 g of NaCl in 250. mL of a NaCl solution Part B. calculate the volume, in liters, for each of the following 34.0 g of NaHCO3 from a 1.00 M NaHCO3 solution (express your answer as three significant figures) Part C. calculate the final concentration of each of the following 1. a 20.0 ml sample of an 7.0% (m/v) KBr solution is diluted with water so that the final volume is 222.0 mL 2....