Chapter 33, Problem 4ASA

Using a new transfer pipet each time, transfer 15-20 drops of each solution into the correct test tube. 0.1 M НСІ 0.001 M 0.00001 M HCI НСІ Distilled Water 0.00001 M NaOH 0.001 M NaOH 0.1 M NaOH 0.1 M HCI

For #2 the GH is 45 (G.H =4.5) Mass percent for oxalate is 60% on both trials

Find: t 1/2 of reaction 1 and t 1/2 of reaction 2

The following complexation reaction was carried out by using 2.5 g of cobalt(II)nitrate hexahydrate with 10.0 g of ammonium carbonate and excess of ammonia and hydrogen peroxide. Co(NO3)2.6H2O + 4NH3(aq) + (NH4)2CO3 + ½ H2O2 → [Co(NH3)4CO3]NO3 +  NH4NO3 + 6H2O + NH4OH     Which is the limiting reagent in the above reaction? Mention how you will identify it.   2. Write the oxidation and reduction half equations of this reaction.                                                                                                               3.  How did Werner first explain bonding in complexes? (Refer website)

Predict the products of the chemical reaction (select all that apply and pay attention to coefficients).Na2O(s) + H2O(l) →A. Na+B. NaC. 2 OH–D. OH–E. 2 Na+F. 2 NaG. H3O+H. H2O2

24. A 5.00 mL aliquot of 0.250 M Pb(NO3)2­ ­is diluted to 100.0 mL. What is the concentration of the resulting solution? Select one: a.5.00 M b.0.0125 M c.0.0119 M d.0.250 M

10- During the reduction experiment you add 1.6 mL of cyclohexanone (MW - 98.15g/mol, density 0.948 g/mL), 4.9 mL of methanol (MW-32.04 g/mol, density 0.792 g/mL, and 0.11 g of sodium borohydride (MW 37.83 g/mol) to your reaction flask.You complete the steps of the reduction experiment exactly as indicated in the lab manual.If you recover 0.79 g of cyclohexanol (MW - 100.158 g/mol), what is the % yield of the reaction? (Your answer should be in percent form, rounded to the nearest integer.

Q2 A sample of 0.7 g of benzoic acid was taken and a re-crystallization process was performed, so the weight of the crystals was with the filter paper 2 0.87 Calculate the percentage of the acid after crystallization if the weight of the filter paper was 4.50 g

Solve this gravimetric analysis problem. 644 mg of a sample contains Mg (AW = 24) has been dissolved in water. The magnesium content of the sample is precipitated as MgNH4PO4.6H20 and ignited and weighted as Mg2P2O7 (mw= 222). If this weight is 290 mg, calculate the percentage of Mg in the sample?