0.4556 g of Na2CO3 (FW = 105.99 g/mol) was dissolved in water and titrated with a solution H2SO4 of unknown Normality.
20.35 mL of H2SO4 solution was required to reach the final endpoint. What is the Normality of the H2SO4 solution?
(Answer in 4 sig figs)
0.4556 g of Na2CO3 (FW = 105.99 g/mol) was dissolved in water and titrated with a...
4.00 g Na2CO3 is dissolved in H2O and titrated with HCl. 48.0 mL of a HCl solution were required to titrate the Na2CO3 solution. What is molarity of HCl solution? Na2CO3(aq) + 2HCl(aq) --> 2NaCl(aq) + H2O(l) + CO2(g)
A 22.9 % (by mass) solution of ferrocene (FW = 186.04 g/mol) dissolved in hexane (FW = 86.18 g/mol) has a density of 1.421 g/mL. What is the mole fraction (Χ) of ferrocene? Ferrocene is a non-electrolyte.
A solid weak acid is weighed, dissolved in water and diluted to exactly 50.00 ml. 25.00 ml of the solution is taken out and is titrated to a neutral endpoint with 0.10 M NaOH. The titrated portion is then mixed with the remaining untitrated portion and the pH of the mixture is measured. Mass of acid weighed out (grams) 0.773 Volume of NaOH required to reach endpoint: (ml) 19.0 pH of the mixture Ihalf neutralized solution 3.54 Calculate the following...
4.00 g Na2CO3 is dissolved in H20 and titrated with HCI. 48.0 mL of a HCl solution were required to titrate the Na2CO3 solution. What is molarity of HCl solution? Na2CO3(aq) + 2HCl(aq) --> 2NaCl(aq) + H2O(l) + CO2(g) O 1.88 molar O 3.21 molar O 1.57 molar O 9.37 molar O 2.59 molar O 0.123 molar 0.553 molar 02.02 molar
7. A small amount of CuSO4*5H20 (0.973 g) was dissolved in 100.0 mL of water, When a 10.0 mL aliquot was titrated with EDTA, the endpoint was reached at 38.05 mL. A 10.0 mL aliquot of a 100.00 mL sample of unknown copper solution was also titrated with the same solution of EDTA. The endpoint was reached at 35.23 mL. What is the mass of Cu?' in the unknown solution?
An aqueous ethylene glycol (HOCH2CH2OH, FW=62.07 g/mol) solution with a mass of 220.7 mg is titrated with 45.3 mL of 0.0671 M Ce4 in 4 M HClO4. The solution is held at 60 °C for 15 min to oxidize the ethylene glycol to formic acid (HCO2H) and carbon dioxide. The excess Ce4+ is titrated with 11.73mL of 0.0449 M Fe2+ to a ferroin end point. What is the mass percent of ethylene glycol in the unknown solution? mass percent =__________%
An aqueous ethylene glycol (HOCH2CH2OH, FW = 62.07 g/mol) solution with a mass of 253.1 mg is titrated with 49.5 mL of 0.0895 M Ce4+ in 4 M HCIO4. The solution is held at 60°C for 15 minutes to oxidize the ethylene glycol to formic acid (HCO2H) and carbon dioxide. The excess Ce4+ is titrated with 10.81 mL of 0.0439 M Fe2+ to a ferroin end point. What is the mass percent of ethylene glycol in the unknown solution? Number
A sample of sodium carbonate (Na2CO3 (s), 105.99 g/mol) with a mass of 0.3531 g is titrated with 0.042 L HCl (aq). Calculate the molarity of the HCl solution.
A 0.173 g sample of a monoprotic acid is dissolved in water and titrated with 0.120 M NaOH. What is the molar mass of the acid if 10.5 mL of the NaOH solution is required to neutralize the sample? molar mass: 274.6 molar mass: 274.6 g/mol g/mol
A 0.767 g sample of a monoprotic acid is dissolved in water and titrated with 0.190 M KOH. What is the molar mass of the acid if 32.0 mL of the KOH solution is required to neutralize the sample? molar mass: g/mol