Question

In: Chemistry

what mass of KCl in grams must be added to 500 ml of a 0.15 M...

what mass of KCl in grams must be added to 500 ml of a 0.15 M KCl solution to produce a 0.40 M solution

Solutions

Expert Solution

no of moles of KCl   = molarity * volume in L

                                 = 0.15*0.5   = 0.075 moles

no of moles of KCl   = molarity * volume in L

                                 = 0.4*0.5    = 0.2 moles

no of moles of KCl is added = 0.2-0.075    = 0.125 moles

mass of KCl   = no of moles * gram molar mass

                        = 0.125*74.5   = 9.3125 g of KCl>>>>answer

9.3125g of KCl is added

queen_honey_blossom answered 2 years ago
Next > < Previous

Related Solutions

How many grams of ammonium chloride, NH4Cl, must be added to 500 ml of 0.10 M...
How many grams of ammonium chloride, NH4Cl, must be added to 500 ml of 0.10 M NH3 solution to give a solution with a pH of 9.0?
What mass (in grams) of sodium benzoate must be added to 150.0 mL of a 0.14...
What mass (in grams) of sodium benzoate must be added to 150.0 mL of a 0.14 M benzoic acid solution in order to obtain a buffer with a pH of 4.25? The molecular weight of sodium benzoate is 144.11g/mol. The Ka of benzoic acid is 6.46x10^-5. Be sure to include proper units in your answer to two significant figures.
What mass of Na3PO4 must be added to 82.9 mL of 0.281 M HCL to obtain...
What mass of Na3PO4 must be added to 82.9 mL of 0.281 M HCL to obtain a buffer with a pH of 7.66? Ka1(H3PO4) = 7.5x10-3 Ka2(H3PO4) = 6.2x10-8 Ka3(H3PO4) = 3.6x10-13 Mass = ___________ g ****PLEASE ONLY ATTEMPT IF YOU KNOW THE ANSWER AS I'M DOWN TO MY LAST ATTEMPT*** THANKS!
What mass of NH4Cl must be added to 250.0 mL of 0.200 M NH3 solution to...
What mass of NH4Cl must be added to 250.0 mL of 0.200 M NH3 solution to have a buffer solution at pH=8.90? Assume no volume change. A 15.0-mL sample of a H3PO4 solution is titrated with a 1.00 M NaOH solution. The neutralization reaction is complete when 33.6 mL of NaOH is added. What is the concentration of the H3PO4 solution (in M)?
What mass of ammonium nitrate must be added to 350 mL of a 0.150 M solution...
What mass of ammonium nitrate must be added to 350 mL of a 0.150 M solution of ammonia to give a buffer having a pH of 9.00. (kb(NH3)=1.8x10^-5). please show each step in detail.
What mass in grams of a 10.0% by mass aqueous silver nitrate solution must be added...
What mass in grams of a 10.0% by mass aqueous silver nitrate solution must be added to 100.0 mL of an aqueous solution that is 0.0250 M in chromium (II) chloride and 0.0200 M in chromium (III) chloride to precipitate all chloride ion as silver chloride from solution?
What mass in grams of a 10.0% by mass aqueous silver nitrate solution must be added...
What mass in grams of a 10.0% by mass aqueous silver nitrate solution must be added to 100.0 mL of an aqueous solution that is 0.0250 M in chromium (II) chloride and 0.0200 M in chromium (III) chloride to precipitate all chloride ion as silver chloride from solution?
5. How many grams of solid NaCNO must be added to 100 mL of 0.2 M...
5. How many grams of solid NaCNO must be added to 100 mL of 0.2 M HCNO at 25°C to obtain a buffer at pH = 4.00? 13. What is the pH of the buffer formed when 200 mL of 0.04 M propionic acid is mixed with 50 mL of 0.12 M sodium propionate (NaC3H5O2)at 25 °C?
What is the minimum mass of potassium carbonate that must be added to 100.0 mL of...
What is the minimum mass of potassium carbonate that must be added to 100.0 mL of a 0.235 M solution of silver(I) nitrate in order to form a precipitate?
If 2.00 mL of 0.100 M Pb(NO3)2 are added to 1.00 L of 0.100 M KCl...
If 2.00 mL of 0.100 M Pb(NO3)2 are added to 1.00 L of 0.100 M KCl will a precipitate form? What will be the precipitate?
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT