What is the volume of H2O that is needed to make a concentration of 20mM Cl...
What is the concentration of K+ in 0.15 M of K2S? If CaCl2 is dissolved in water, what can be said about the concentration of the Ca2+ ion? It has the same concentration as the Cl− ion. Its concentration is half that of the Cl− ion. Its concentration is twice that of the Cl− ion. Its concentration is one-third that of the Cl− ion. A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment....
If you have a 20mM solution of NaH2PO4 and you want to make a solution of pH=6.42, what should be the concentration of Na2HPO4 ? The pka of these two forms is 6.82. - Bonus Q: How many grams of Al(SO4)3 18H20 (MW 666.42 g/mol) would you add to 200 ml water to make a 20mm stock solution? sm wolnaza arlok
PLEASE ANSWER ALL 10. What volume of 14N H2SO4 is needed to make 500 mL of 3.2M H2SO4 solution? 11. A solution contains 40 g of solute dissolved in 0.5 L of water. What is the percentage of this solution? 12. How many mL of 4M H2SO4 are required to make 1.5L of 0.5M acid? 13. 100mL of 8% NaCl solution contains g of NaCl 14. A liter of 0.95% solution of NaCl contains g of NaCl 15. 2500mL of...
For the reaction of Pt(NH3)2Cl2 + H2O --> Pt(NH3)2(H2O)Cl+ + Cl- the rate law was given as rate=k[Pt(NH3)2Cl2] with k=0.090hr-1. Calculate the initial rate of reaction when the concentration of Pt(NH3)2Cl2 is (i) 0.010M (ii) 0.020M (iii) 0.040M
Calculate the required volume needed to make a 1.65 M solution consisting of 33.8 moles. Calculate the required volume needed to make a 3.14 M solution consisting of 2.53 g of H2SO4 Calculate the number of moles of barium sulfide required to make 200 mL of a 0.53 M solution. Calculate the mass of sodium chloride in a 0.0854 M solution, given 625 mL. 511 mL of a 9.22 M solution was diluted to 18.5 L. What is the new...
What is the initial volume, in milliliters, needed to prepare each of the following diluted solutions? A) 150 mL of 4.0 % (m/v) glucose from 22 % (m/v) glucose B)55.0 mL of 3.0 % (m/v) CaCl2 from 7.0 % (m/v) CaCl2 C)150. mL of 4.00 MH2SO4 from 18.0 MH2SO4 Express answers to 3 significant figures
Reaction #2-CaCl2 + Li2CO3 Concentration CaCl2:0.250 C Volume Cacl;: 500 Observations upon mixing Concentration Cack,: 025M Concentration Lco 25 M Concentration Li CO: Volume Li2co,:-_-)00 ml mL After Filtration Observations with additional CaCl Nothing changeod Observations with additional Li CO3 Report Form Reaction #2 How many moles of Li,CO, were in the initial reaction? How many moles of Li" is this? How many moles of Co,2 is this? What is the limiting reactant? How can you tell based on your...
3. What is the volume, in milliliters, needed to make a 0.5 M solution that contains 0.358 mol of NaOH? 4. What mass of NaOH is needed to make a 2L of a 1.5 M solution?
1. A. What volume of 6M nickel (II) chloride is needed to make 5.0L of .3m solution? B. What mass of solid nickel (II) chloride is needed to make the same 5.0L of a 3m solution? 2. Using the data for the nickel(II) chloride from problem 1b calculate the theoretical freezing and boiling points for the solution.
#13 c. What volume of .00 M HNO3 is needed to make 675 mL of 0.750 M HNO:? d. What volume of 15,0 M H,PO is needed to make 750.0 mL of 3.0 M H3PO4? 13. A group of shipwreck survivors floated for several days on a life raft before being rescued. Those who had drunk some seawater were found to be suffering the most from dehydration. Explain.