Concentrated hcl has a specific gravity of 1.185 and is 36.5% (w/w) in HCl. Describe how 1.0 L of 0.050M HCl would be prepared from the concentrated reagent
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Concentrated hcl has a specific gravity of 1.185 and is 36.5% (w/w) in HCl. Describe how 1.0 L of 0.050M HCl would be prepared from the concentrated reagent.
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- 1. Concentrated HCL has a specific gravity of 1.185 and is 36.5% (w/w) in HCl. Describe how 1.0 L of 0.05 M HCl would be prepared from the concentrated ReagentA mixture of ethanol, benzaldehyde and KMnO4 is mixed together. Would you expect a precipitate to form based on the reactants functional groups?Multiple choice questions. Pick the right answers Benzene is one of the Toxic Air Pollutants (TAPS) found in car exhaust fumes When a 50.00 ml. aqueous sample containing a 0.05000 M benzene (molecular weight = 78.11g/mol) is extracted twice with 10 00 ml. portions of chloroform, it is found that 1.50x 10 moles of the original compound has been extracted into the chloroform i) Calculate the value of the partition coefficient for the extraction of benzene in water using chloroform A 2.75 B 2.91 C 7.51 D 2.81 ii) determine the extraction efficiency of a single extraction A. 0.575 B. 0.400 C. 0.368 D. 0.600 iii) determine the total volume of the chloroform which will be needed to extract 99% of the benzene from the aqueous phase A 50.72 mL B 150 00 mL C 110 00 mL D 46.28 mL.
- Describe the preparation of 2L of a 0.4 M HCl starting with a concentrated HCl solution (28% w/w, specific gravity = 1.15) -36.5 gm/molA 0.8250 g of soda ash sample was dissolved in distilled H O and diluted to 250-mL using a volumetric flask. A 50.00 mL aliquot portion of the dilute soda ash solution needed 4.50 mL of 0.1200 M HCl to reach the phenolphthalein end point and 10.00 mL to reach the methyl orange end point. What is the %NaHCO (%w/w) present in the soda ash sample? FW NaHCO = 84.01 g/mol (Hint: Use dilution factor)What is the molarity of a solution made by dissolving 6.08 g of sodium acetate, CH3COONa, in water, and diluting it to a total of 0.750 L?
- A 0.8250 g of soda ash sample was dissolved in distilled H O and diluted to 250-mL using a volumetric flask. A 50.00 mL aliquot portion of the dilute soda ash solution needed 4.50 mL of 0.1200 M HCl to reach the phenolphthalein end point and 10.00 mL to reach the methyl orange end point. From the volumes of HCl needed to reach the phenolphthalein and methyl orange endpoints, how many millimoles of NaHCO are there in the aliquot portion that was titrated?500 mL of pure water is first added to 500 mL of 0.500 M K2Cr2O7, making a “standard” solution. What volume of the “standard” solution, when diluted to 500 mL, will be needed to produce another “standard” solution of 0.100 M K2Cr2O7?2. How many grams (g) of CaSO4 is formed when 20 mL of 0.10 M Na2SO4 is added to 100 mL of 0.01 M CaCl2?
- ) What voluma of 18m sulferic acid must be diluted with distilo d wateir to prepare 300.0 mb of 0:50 M HA S04 2 इDO ,OWhat is the equivalent weight of an organic acid if 44.00 mL NaOH solution (1.000 mL ≎ 1.100 mL HCl ≎ 0.01001 g CaCO3) are required to neutralize 0.5192 g of the organic acid?0m205g PBr2 dissolved in 12.5g H2O is considered to be