A lab technician has 250 ml of 5 M solution. How many mL of water must be added to this solution to obtain a 0.25 M solution?
A. 5000 B. 4750 C. 500 D. 450
A lab technician has 250 ml of 5 M solution. How many mL of water must...
How many mL of a 4.00 M HCl solution must be added to 250 mL of a 0.250 M NH3 solution to make a buffer with pH = 9.10? Look up Ka or Kb in a suitable source.
Determine how many mL of solution A(acetic acid-indicator solution) must be added to solution B (sodium acetate indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. You will need to refer to the Experimental Procedure, partcularly the section on calculations, to answer this question. Show all calculations. of an indicator 2. Determine how many ml of solution A (acetic acid-indicator solution) must be added to solution B sodium acetate-indicator solution) to obtain a buffer...
< 16 of 32 > Part A 250 mL of a 6.0 M HNO3 stock solution is diluted using water to 100 mL. How many moles of HNO3 are present in the dilute solution? View Available Hint(s) 60 moles 0.15 moles 0.6 moles 1.5 moles Submit Part B How many mL of a 14.0M NH3 stock solution are needed to prepare 200 mL of a 4.20 M dilute NH3 solution? ► View Available Hint(s) 600 ml 0.060 mL 840 mL...
How many mL of 0.90 M HCl must be added to 250 mL of 0.280 F sodium formate in order to adjust the pH to 3.50? Formic acid Ka = 1.8x10^-4
How many grams of KOH must be added to 500 mL of a 0.100 M solution of Phosphoric acid to produce a buffer pH 12.50? pKa for phosphoric acid = 12.66
17. How many milliliters of 4.00 M HNO3 must be added to 75.0 mL of 1.00 M Ba(OH)2 to obtain a neutral solution? hest n D) 150. uloa bstm Sstances Which C) 18.8 o.abauoq03 gaiwollo B) 37.5 A) 300.
How many milliliters of a 0 250 M solution can be prepared by dissolving 4.00 g of NaCl in water? How many grams of lithium bromide, LiBr, could be recovered by evaporating 550. mL of 20.0 percent LiBr solution to dryness (d = 1.34 g/mL)? How many milliliters of 6.0 M HCl is needed to prepare 500. mL of a 0.150 M HCl solution? A sample of potassium hydrogen phthalate, HKC_4H_4O_4, weighing 0.512 g was dissolved in water and titrated...
How many moles of CaCl2 are in 250. mL of a 3.00 M of CaCl2 solution? A) 3.00 mol B) 1.33 mol C) 83.3 mol D) 750. mol 250 m2 3.00 moles 1.08206
28 How many milliliters of a 4.0% (w/v) solution must be used to prepare 250 mL of a 0.080% (w/v) solution? A 5.0 mL B 2.5 mL 0.50 mL D 25 mL
How many mL of 3.50 M potassium hydroxide must be added to 500 mL of a 0.200 M carbonic acid solution to make a buffer with pH = 6.30? (Assume only the first hydrogen is dissociated.)