kf for water is 1.86 m
Let NaNO3 be x gms
ΔTf = iKfm
5.44 = [(x/85) + (6.5-x)/148]/0.05 x 1.86 x 5
0.029 = (x/85) + (6.5-x)/148
0.029 * 148 * 85 = 148x + 85(6.5-x)
x = 2.98 gms = NaNO3
Mg(NO3)2 = 3.52 gms
A solid consist of a mixture of NaNO3 and Mg(NO3)2. When 6.50 g of the solid...
A solid consists of a mixture of NaNO3 and Mg(NO3)2. When 6.50 g of the solid is dissolved in 50.0 g of water, the freezing point of the solution is lowered by 5.26°C. What is the composition by mass of the solid? ----- g NaNO3 ----- g Mg(NO3)2
A solid consists of a mixture of NaNO3 and Mg(NO3)2. When 6.50 g of the solid is dissolved in 50.0 g of water, the freezing point of the solution is lowered by 5.06°C. What is the composition by mass of the solid? ____ g NaNO3 ? ____ g Mg(NO3)2 ?
A solid consists of a mixture of NaNO3 and Mg(NO3)2. When 6.50 g of the solid is dissolved in 50.0 g water, the freezing point is lowered by 5.50°C. What is the composition, by mass, of the solid? Mg(NO3)2 ?g NaNO3 ?g
A solid consists of a mixture of N2NO3 and Mg(NO3)2. When 6.50 g of the solid is dissolved in 50.0 g of water, the freezing point of the solution is lowered by 5.26°C. What the composition by mass of the solid? g NaNO3 g Mg(NO3)2 I think Kf value is 1.86
When 0.49 g of a molecular compound was dissolved in 20.00 g of cyclohexane, the freezing point of the solution was lowered by 3.9 degree C. Determine the molecular mass of this compound. The molar freezing point depression constant of cyclohexane 20.4 degree C/m. (K_f = 20.4 degree C/m)
6.16 Classify each of the following solutes as an electrolyte or a nonelectrolyte a. NaNO3 b. C6H12O6 c. FeCl3 6.26a Calculate the composition of 20.0 g acetic acid dissolved in 2.50 L in mass/volume% 6.28b Calculate the %m/m composition of 50.0 g KCl in 5.00 x 102 mL solution (d=1.14g/mL) 6.30a How many g of solute are needed to prepare 2.50x102 g of 5.00% (m/m) NH4Cl? 6.34 How many mL of 4.0 mass/volume % Mg(NO3)2 solution would contain 1.2 g...
A 11.56 g mixture of sugar (C_12H_22O_M) and table salt (NaCl) is dissolved in 203 g of water. The freezing point of the solution was measured as -2 57 degree C Calculate the mass percent of sugar in the mixture. A list of K_t values can be found here.
A 14.23 g mixture of sugar (C_12H_22O_11) and table salt (NaCI) is dissolved in 177 g of water. The freezing point of the solution was measured as -3.41 degree C. Calculate the mass percent of sugar in the mixture. A list of K_f values can be found here Number %
When a 5.12-g sample of solid sodium nitrate dissolves in 31.1 g of water in a coffee-cup calorimeter (see above figure) the temperature falls from 25.00 oC to 16.37 oC. Calculate H in kJ/mol NaNO3 for the solution process. NaNO3(s) Na+(aq) + NO3-(aq) The specific heat of water is 4.18 J/g-K. We were unable to transcribe this imageWe were unable to transcribe this imagethermometer stirrer coffee cups containing reaction mixture When a 5.12-g sample of solid sodium nitrate dissolves in...
A precipitate will form when aqueous AgNO3 is added to an aqueous solution of KBr NaNO3 Ca(CIO)2 Cu(NO3)2 Mg(NO3)2