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Postlab Questions Show your work or your reasoning, 1. How many grams of Green W3 dye (808.84 g/mol) are needed to...
Background The common laboratory acids such as H2SO, HCI, HNO3, and HC2H302 arrive in the teaching stockroom as very concentrated AQUEOUS solutions that we refer to as concentrated H2SO4(aq), concentrated HCl(aq), etc. You used con (concentrated) H2SO4(aq) as a catalyst in the preparation of aspirin. Calculate the molarity of con H2SO4(aq). Information on the container tells us that con H2SO4(aq) is 96.0% by mass H2SO4 and has a density of 1.84 g/ml. In carrying out the calculation, assume you are...
Background The common laboratory acids such as H2SO4, HCI, HNO3, and HC2H302 arrive in the teaching stockroom as very concentrated AQUEOUS solutions that we refer to as concentrated H2SO.(aq), concentrated HCl(aq), etc. You used con (concentrated) H2SO4(aq) as a catalyst in the preparation of aspirin. Calculate the molarity of con H2SO4(aq). Information on the container tells us that con H2SO4(aq) is 96.0% by mass H2SO4 and has a density of 1.84 g/mL. In carrying out the calculation, assume you are...
w your work or your reasoning. How many grams of Green #3 dye (808.84 g/mol) are needed to prepare 5.00 L of a 3.08 x 10-5 M solution?
10.1 Practice basic skills (grams, moles, g/mol, mol/L, dilution, stoichiometry): (a) Mow many grams of Br2 are produced when 1.50 g of FeBr; react with excess CI? 3 Cl2 + 2 FeBr + 3 Br2 + 2 FeCl3 (b) If the reaction in (a) happens in 500 mL of solution, what is the resulting molarity of CI? (c) Calculate the mL of concentrated H2SO4 (18 M) required to prepare 750 mL of 2.0 M solution.
How many grams of Na3PO4 (MW = 164 g/mol) are needed to make 282.3 mL of solution that is 0.200 M sodium?
How many grams of NaH2PO4 are needed to react with 71.11 mL of 0.881 M NaOH? NaH2PO4(s) + 2NaOH(aq) → Na3PO4(aq) + 2H2O(l)
2) How many grams of sodium hypochlorite (NaClo) are needed to make 250 mL of 0.700 M NaClO solution? 3) How many grams of KCO, would be needed to make 4.55 mL of a 15.00 (m/v) solution? 4) A 34.0 % (m/m) sulfuric acid (H2SO4) solution has a density of 1.25 g/mL. What is the molarity of this solution?
MOLARITY REVIEW 1.) How many nitrate ions are present in a 25.00mL sample of a 2.50M calcium nitrate solution? 2.) How many mL of a 0.300M lead(II) nitrate solution are needed to react with 50.00mL of a 0.500M potassium chromate solution? (solution stoichiometry problem) 3.) How many mL of a 0.700M Ca(NO3)2 solution are necessary to react with 25.00mL of a 1.000M H2SO4 solution? 4.) 25.66mL of a solution hydroxide solution reacts with 22.55mL of a 0.888M phosphoric acid solution,...
#29 and 32
ws (29. How many grams of nitric acid are present in 250.0 mL of 6.70M acid solution? a. 16.8 g b. 106 g c. 335g d. 211 g 30. How many liters of water are required to prepare a 0.1590 M silver nitrate solution if 1.00 pound of silver nitrate is used? a. 8.38 L b. 16.8 L c. 7.61 L d. 36.9 L 31. Considering that calcium chloride is a strong electrolyte, what is the molarity...
1.) How many moles of NaOH (aq) are needed to neutralize 3.2 mol H2SO4(aq)? 2.) How many moles of Ba(OH)2 (aq) are needed to neutralize 3L of 0.8 M HCl solution? 3.) What is the volume of 0.5 M H2SO4 solution needed to neutralize 0.15 L of 0.6M NaOH solution? 4.) How many grams of NaOH needed to neutralize 0.25 L of 0.6 M H2SO4 solution? Molar mass of NaOH= 40 g/mol 5.) 2.8g of Ba(OH)2(s) is added to water...