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- From a 10-mL sample, a 1-mL aliquot was taken and diluted to 100mL. From this, a 5-mL aliquot was taken and diluted to 20mL.The final 20mL was found to have a concentration of 0.004M analyte X.What is the concentration of analyte X in the 10-mL sample?A sample of calcium oxalate powder with a porosity of 46% and weighing 123.4 g was found to have a bulk volume of 105 mL when placed in a 100 mL graduated cylinder. Compute for the density. Show your solution.You are given 2 ml of a stock solution of phenol red at a concentration of 258 mg/ml and 20 ml of 0.5 potassium phosphate buffer pH 7. You need 100 ml of a solution containing 50 mM potassium phosphate buffer pH 7 and 87 ug/ml phenol red to do a spectrophotometric analysis. How would you make this new solution?
- Please don't provida handwrittin solution....I need 20 ,21 ,22A measurment for the Lambda-max for a colored solution is 671 nm with a very high Absorptivity. What does the color of the solution look like in the sunshine? and What does the color look like in a room where the only light source emits 671 nm