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- What is the method of separation or chemical reaction of a 500 g calcium polysulphide and a 1.5 kg hydrochloric acid? Kindly explain.2.1g of sample are dissolved in methylene chloride and the sample is extracted with aqueous solutions of acid and base. Three compounds are isolated - 0.8g of ethyl p-aminobenzoate, 0.6 g of acetanilide, and 0.5 g of benzoic acid. Calculate the % recovery for the procedure. (Round the answer to the nearest tens place.) Give just the number, not a % sign.)CuSO4(NH3)3(H2O)2. If you started with 6.0 g of CuSO4•5H2O and 10.0 mL of 15 M NH3, how many moles of each reagent were used? Show your work.
- The stock erythrosine B solution is 8.5 × 10-5 M. Calculate the volume of this solution that you must pipet into a 50-mL volumetric flask, which, when diluted to mark with deionized water, will give a final concentration of 1.7 × 10-5 M. Show your calculation setup.In a lab experiment, 3.4g of methyl orange product was produced using the following: 2.25g sulfanilic acid, 1.3g sodium nitrite, 1.5ml N,N-dimethylaniline, 10ml NaOH and 2.5g NaCl. SHOW FULL WORKING AND ANSWER BOTH PARTS OF THE QUESTION: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)
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