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How much Ca OH<sub>2 </sub>(molecular weight 74) should be added to 200ml of H<sub>2</sub>O to make an 18%(w/v) solution
%w/v = 18%Mass of solute= ?Volume of solution= 200ml= 0.20L%w/v = mass of solute/litres of solution x 100%Mass= 18 x 0.20/100Mass= 0.036g of Ca(OH)2Molar mass of Ca(OH)2 is 74g/molMole =...
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Calculate the molality of a sucrose solution made by dissolving 67.9 grams sucrose into 94.9 grams water. The molar mass of sucrose is 342.2 g/mol.
С (molality of sucrose) = n (sucrose)/m (water);n (sucrose) = m/M = 67.9/342.2 = 0.2 mole;С (molality of sucrose) = 0.2 mole/94.9 = 0.0021 mole/kg.Answer: C = 0.0021 mole/kg.
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The question is - to prepare 5 milimeters of a 10 millimolar solution of glucose from a 1 molar stock solution how many micro litres of stock need to be added to how many millilitres of water
5milimetres = (10 millimolar)(1) = (10)(5) = 2microlitres = 2000 microlitres10 -2 = 8 milimetres of water = 0.1×8 = 0.8 milliliters of water
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How much of 0. 3 AM start solution of sucrose what you need to make 150 mL dilution of sucrose at a final concentration 0.1
Molar mass of Sucrose = 342.2970.3 × 342.297 = 102.69= 150 - 102.69 = 47.31ml= 0.1 × 47.31 = 473.1ml
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Benzyl amino purine (BAP) stock solution is made as 100mg in 100 ml. How many milliliters of BAP should be used to make 5 liters of MS medium which should contain 10 mg/L BAP.
5×1000= 50005000/100=50
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100ml ,1 M OF sucrose solution when treated with charcol becomes 0.8M .Amount of sucrose adsorbed in moles is ?
100 mL = 0.1 LInitial amount in moles:1mol/L * 0.1L = 0.1 molFinal amount in moles:0.8mol/L * 0.1L = 0.08 molTherefore, the amount of sucrose adsorbed is 0.1 - 0.08...
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1. An experiment requires a solution that is 80% methyl alcohol by volume. What volume of methyl alcohol should be added to 200 mL of water to make this solution?
Solution:The percentage of CH3OH by volume is defined as:ϕCH3OH = [VCH3OH / (VCH3OH + VH2O)] × 100%Hence,ϕCH3OH / 100% = VCH3OH / (VCH3OH + VH2O)80% / 100% = VCH3OH /...
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How many milligrams of water must be used to dissolve 100.0 grams of sucrose (C<sub>12</sub>H<sub>22</sub>O<sub>11</sub>) to prepare a 0.40 mole fraction of sucrose in the solution?
Milligrams of water=245ml
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how many grams of NaCl should be weighed to prepare 1.00L of 601 ppm solution of Na+? how many grams of NaCl should be weighed to prepare 1.00 L of XYZ ppm solution of Na+?
Quantity of NaCl =4.72g
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What mass of sucrose (C 12 H 22 O 11 ) is dissolved in 50.0 mL of a 0.400 mol/L solution of
sucrose in water?
n(C12H22O11) = V*C = 0.050*0.400 = 0.02 molm(C12H22O11) = m*M = 0.02*342 = 6.84 g
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