Question

In: Chemistry

What are the densities of 5% (m/m) glycerin and 60% (m/m) glycerin?

Expert Solution

DENSITY= MASS/VOLUME

MASS= NO.OF MOLES X MOLECULAR MASS

1, Assume some fixed volume of the solution.

For convenience, let's assume a volume of 1 L

DENSITY OF GLYCERIN = 1.26 g/cm³

so concentrated grycerin in 1 L = 1260 g

5% of glycerin = 1260 x 5/100

=63g

=mass/density = 63/1.26

= 50ml

remaining volume of solvent= 950ml

let us assume water as solvent

mass of water = density x volume

= 1 x 950=950g

density of 5% glycerin= 63+950/1000

= 1.013g/ml

similarly,

60% of glycerin = 756g

=756/1.26

=600ml

remaining volume of solvent = 1000-600

= 400ml

mass of water = density x volume

= 1 x 400=400g

density of 5% glycerin= 756+400/1000

= 1.156g/ml

queen_honey_blossom answered 2 years ago

5. A ball is dropped from the top of the building whose height is 60 m....

5. A ball is dropped from the top of the building whose height is 60 m. At the same time, another ball is thrown up from the ground with a velocity of 25 m/s. i) At what distance from the top do the balls cross each other? ii) How much time does the two balls take to cross each other? iii) What is the maximum height does the second ball reach?

List the following aqueous solutions in order of decreasing freezing point: 0.040 m glycerin (C3H8O3), 0.020...

List the following aqueous solutions in order of decreasing freezing point: 0.040 m glycerin (C3H8O3), 0.020 m KBr, 0.030 m phenol (C6H5OH

What is the vapor pressure of an ideal solution of ethanol if 1 mile of glycerin...

What is the vapor pressure of an ideal solution of ethanol if 1 mile of glycerin is placed in 4 moles of ethanol at 40?C? Pure ethanol has a vapor pressure of 135.3 torr.

Bacteria densities in air are usually positively correlated with the densities of particulates and dust. See...

Bacteria densities in air are usually positively correlated with the densities of particulates and dust. See this example from Mancinelli and Shulls (1978): Bacterial parameter Particulates Micrococcus +0.45b Aerococcus +0.31 Staphylococcus +0.38 Total no. of rods isolated +0.41 Total no. of cocci isolated +0.37 Total no. of viable bacteria isolated +0.56b Why is this?

What mass of glycerin (), a nonelectrolyte, must be dissolved in 200.0 g water to give...

What mass of glycerin (), a nonelectrolyte, must be dissolved in 200.0 g water to give a solution with a freezing point of –2.00°C?

What is the pH of solution if 40 mL 0.1 M HCl is mixed with 60...

What is the pH of solution if 40 mL 0.1 M HCl is mixed with 60 mL 0.2 M HAc?

NEED ASAP A cannonball is fired at 85 m/s at 60° above the horizontal. For what...

NEED ASAP A cannonball is fired at 85 m/s at 60° above the horizontal. For what period of time is the cannonball at height of 200 m or greater?

Equilibrium Concentrations 1 2 3 4 5 [FeSCN2+] 1.49x10-5 M 4.69x10-5 M 7.47x10-5 M 1.01x10-4 M...

Equilibrium Concentrations 1 2 3 4 5 [FeSCN2+] 1.49x10-5 M 4.69x10-5 M 7.47x10-5 M 1.01x10-4 M 2.65x10-4 M [Fe3+] 6.0x10-4 M 6.0x10-4 M 6.0x10-4 M 6.0x10-4 M 6.0x10-4 M [SCN-] 2.0x10-4 M 4.0x10-4 M 6.0x10-4 M 8.0x10-4 M 1.0x10-3 M Equilibrium Keq 124.2 195.4 207.5 210.4 441.7 Average Keq: 235.8 Does your data support a complete conversion or partial conversion? Based on your results was the measured Keq too high or too low? Explain please.

10. A titration is performed by adding 0.13 M KOH to 60 mL of 0.363 M...

10. A titration is performed by adding 0.13 M KOH to 60 mL of 0.363 M HNO3. a) Calculate the pH before addition of any KOH. b) Calculate the pH after the addition of 33.51, 83.77 and 166.54 mL of the base.(Show your work in detail for one of the volumes.) c) Calculate the volume of base needed to reach the equivalence point. d) Calculate the pH after adding 5.00 mL of KOH past the equivalence point.

PS10.10. A titration is performed by adding 0.254 M KOH to 60 mL of 0.183 M...

PS10.10. A titration is performed by adding 0.254 M KOH to 60 mL of 0.183 M HNO3. a) Calculate the pH before addition of any KOH. b) Calculate the pH after the addition of 8.65, 21.62 and 42.23 mL of the base.(Show your work in detail for one of the volumes.) c) Calculate the volume of base needed to reach the equivalence point. d) Calculate the pH at the equivalence point. e) Calculate the pH after adding 5.00 mL of...