A solution is prepared by dissolving 19.2 g of glucose in 205 g of water. The final volume of the solution is 214 ml. Find the concentration of the solution in units of molality.

Md Ariful Islam

0 like 0 dislike
1 views
Share with your friends

1 Answers

Md Ariful Islam

Call

250 ml × 0.4 = 100ml

= 100/2 = 50ml

Molar mass of sodium hydrogen carbonate = 84.007

Molarity = 111/84.007 = 1.32 mol

1.32/20

= 0.066mol/L

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
A saturated solution of potassium chloride is prepared by dissolving 45 g KCl in 100.0 g water at 60 °C. a. What is the concentration of this solution?

Concentration = Mass of the solute/Mass of the solution= 45/145 = 0.310.31*60 = 18.6g/mol

1 Answers 1 views
A solution of ethanol is prepared by dissolving 25.0 ml of ethanol in enough water to give a total volume of 250.0 ml. What is the percent-by-volume concentration of ethanol?

percent v/v is (mL ethanol/mL solution)×100.So you have 25.0 mL ethanol/250 mL(25/250)×100 = 10% v/v.

1 Answers 1 views
How many grams of a 214 g sample of bismuth-214 will remain after 60 min?

Half life of bismuth-214 is 20 min. 60 min / 20 min = 3 half life periods (1/2)^3 = 0.125 214 g x 0.125 = 26.75 g remains after 60...

1 Answers 1 views
An isotonic saline solution was prepared by dissolving 0.92 g of NaCI in enough distilled water to make 100 ml solution. What is the percent by mass/volume of the solution?

100-0.92= 99.0899.08/100×100= 99.08%

1 Answers 1 views
An isotonic saline solution was prepared by dissolving 0.92g of NaClin 2 points enough distilled water to make 100ml solution. What is the percent by mass/volume of the solution?

Molecular weight of isotonic saline = 58.50.92×58.5 = 53.8253.92/100×100= 53.92%

1 Answers 1 views
What is the concentration (M) of a NaCl solution prepared by dissolving 5.3 g of NaCl in sufficient water to give 115 mL of solution?

Concentration of NaCl = amountof NaCl / L n of NaCl = 5.3 g/ 58.5 = 0.906 mol (but it is in 115 mL) In one L concentration is 1000/115...

1 Answers 1 views
A Ni^2+ solution was prepared by dissolving 300.1g of NiCl2.6H2O in 1dm^3 of distilled water. The Ni^2+ concentration of the solution was found to be 1moldm^-3. Calculate the purity of the solution.

The solution is 74.7% pure.

1 Answers 1 views
The patient has a serum glucose concentration of 60 mg/dL. Calculate that glucose concentration in units of g/L.

1 g = 1000 mg, 1 mg = 0.001 g1 L = 10 dL, 1 dL = 0.1 LFrom here:60 mg/dL = 60 × 0.001 g / 0.1 L =...

1 Answers 1 views
A solution a prepared by dissolving 5.0g of salt in 550g of water what is the mass present of concentration of this solution

w=(m(salt))/m(solution) =(m(salt))/(m(water)+m(salt))×100%=(5.0 g)/(550 g+5.0g)×100%=0.90% Answer: 0.90%.

1 Answers 1 views
Calculate the concentration of hydrated copper sulfate, CuSO4.5H2O in a solution originally prepared by dissolving 0.10g of the solid in water and making up to 50cm3 with water?

MOLAR MASS OF CUSO4.5H2O = 249.5 gm /mol ..given mass of CUSO4.5H2O = 0.10 g .So , moles of CUSO4.5H2O =( 0.10 / 249.5 ) mole .volume of water =...

1 Answers 1 views
X