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Formula of reactants and observation (reaction/ptt/NR/bubbles etc)
Sodium carbonate and potassium nitrate
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- Which reactant is limiting. Solve using dimensional analysis. 3.00ml of a 0.100 M Pb(NO3)2 . 12.00ml of 0.100 M K2CrO4Sample: Saline 0.900% (m/v), in sodium chloride (NaCl). Data: M.A. (g/mol): Na = 22.9898; K = 39.0983; Cr=51.9961; Ag = 107.8682; Cl = 35.453; N=14.0067; O = 15.9994. Material available in the laboratory's warehouse: Reagents: distilled water; standardized solution of silver nitrate (AgNO₃), at a concentration of 0.09980 mols/L; Potassium chromate solution (K₂CrO₄) 1%; ammoniacal ferric alum solution [Fe(NH₄)(SO₄)₂] and; nitrobenzene (or cooking oil, alternatively); 0.1000 mols/L potassium thiocyanate (KSCN) standard solution. Glassware: beakers of all sizes available on the market; 50, 100, 150, 200 and 250 ml Erlenmeyers; 10.00 and 25.00 mL volumetric pipettes; 15.00 mL burette; 30.00, 50.00 and 100.00 mL volumetric flasks Calculate the molarity of saline, in terms of the NaCl concentration (concentration in mols/L). (a) 0.900 mols/L (b) 5.84 mols/L (c) 0.154 mols/L (d) 0.0154 mols/LYou have a solution consisting of magnesium chloride and want to find out the concentration of magnesium ions. Which analysis method do you use? Explain how the analysis is done. Please consider a detailed solution and a good handwirting THnks in advance
- In lab, you add 2.074 g salicylic acid to a 125 mL Erlenmeyer flask, as listed in the procedure. You carefully add 4.0 mL acetic anhydride and have your TA add 5 drops of sulfuric acid. After completing the synthesis and filtering, you place the crystals to dry on an evaporating dish that weights 21.682 g. After drying, the crystals and evaporating dish weigh 23.034. Calculate the percent yield of aspirin.comment on the greeness of the experiment. the percent yield was 25%, the atom economy 38.8%, and the reaction effieciency 9.7 %The following problem is patterned after Examples 6-7. The information is based on the spreadsheet shown below. Suppose Ingredient I is made up of 60% micoden and 40% water, Ingredient II is made up of 40% micoden, 40% bixon, and 20% water, and these ingredients are mixed together. What is the percentage of bixon in mixture a? Please type answer note write by hend
- PLEASE SOLVE THIS ASAPPP. Please disregard the answers already given. Please show your work in the same format though. THANKS. It has to do with molecules, balancing chemical equations, and Stoichiometry.Mass of Na2CO3.H2O (g) = 2.12g (g) Mass of the CaCl2.2H2O (g) = 1.98g Mass of the top funnel + filter paper (g) = 15.85g Mass of top funnel + filter paper + CaCO3 collected (g) = 17.81g CaCl2 + Na2CO3 ==== CaCo3 + 2NaCl Theoretical yield in moles and grams? Moles of reagent in excess left unreacted? Mass of precipitate? Experimental yield? Percent yield?In batteries factory, the manager asked the technician to prepare a batch of battery acid with a concentration of 23.6% (wt %) as follows Raw materials (streams) Stream 1: Old weak battery acid (H2SO4) solution contains 16.9% (wt %) of H2SO4 (the rest is pure water) Stream 2:250 kg of 65.2 % H2SO4 How many kilograms of old weak battery acid (H2SO4) are needed to prepare the desired ?battery acid (23.6%) .a o 3313.43 Kg bo 1755.25 Kg .CO 1552.24 Kg .do 3875.14 Kg
- 0.500 cm3 of concentrated H2O2 solution diluted exactly to 50.00 cm3 by water. 10.00 cm3 samples were taking out, and titrated by 0.02003 mol/dm3 KMnO4. The average of the individual result is 18.15 cm3. Give the molarity (mol/dm3) and the mass concentration (g/dm3) of the original concentrated H2O2 sample! Mr = 34.02 g/mol.When Na3PO4 and Ca(NO3)2 are combined , the following reactions occurs:2PO4 3- (aq) + 3 Ca2+ (aq) ------ Ca3PO4)2How many grams of Ca3(PO4)2 (MM = 310.18 g/mol) are obtained from 15.00 ml of 0.1386 M Na3PO4 are mixed with 20.00 ml of 0.2118 M Ca(NO3)2 ?Formaldehyde (CH2O, MM = 30.03) has a multitude of uses includingtissue preservation. Formalin is a commercially available solution offormaldehyde and has a concentration of 19.6 m formaldehyde anda density of 1.09 g/cm3. What is the molarity of formaldehyde inthe solution?