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Question- 1. It requires 25.05 mL of NaOH solution of unknown concentration to titrate 25.00 mL of 0.1000 M H2SO4 solution. The chemical equation that summarizes the reactio is H2SO4 + 2NaOH --> 2H2O + Na2SO4. Calculate the concentration of the NaOH solution.
2. Suppose we add 30.0 mL of .100 M NaOH to 50.0 mL of 0.100 M HCl. Calculate the concentration of the remaining acid that was not neutralized. what is the pH of the solution?
3. Naphthalene normally freezes at 80.2 degrees C and has a Kf value of 6.9 C/m. A solution containing 1.19 g of sulfer dissolved in 10.20 g of naphthalene freezes at 77.1 degrees C. Calculate the molality of the solution and the molar mass of the solute, sulfer.
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Biphenyl is an organic compound that melts at 68.50?C and has a Kfp = 8.00?C/m. If 30.0 mg of lysine and 1.200g of biphenyl has an observed freezing point of 66.13?C, what is the molecular mass of lysine
Peroxydisulfate ion oxidizes iodide ion to triiodide ion, I3, The reaction is S2O82- (aq) + 3I- (aq) --> 2SO42- (aq) + I3- (aq). How is the rate of reaction that is expressed as the rate of formation of I3- related to the rate of disappearance of ..
If the heated copper is then placed into the water in the insulated container, given that the specific heat of copper is 0.385J/(gC), calculate the maximum temperature of the water after the copper metal is added.
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A Standard Reference Material is certified to contain 94.6 ppm of an organic contaminant in soil. Your analysis gives values of 98.6, 98.4, 97.2, 94.6, and 96.2 ppm.
HCN is a weak acid dissolved in water. (Ka=6.2x10^-10). If a 50.0mL sample of 0.100 M HCL is titrated with 0.100 M NaOH 1) what is the pH at the equivalence point
A buffer solutions contains .120 M acetic acid and 0.150 M sodium acetate. How many moles of acetic acid and of sodium acetate are present in 50.0 ml of solution ? = 0.0075 moles.
Substance A is a gray solid that consists of an alkaline earth element and carbon; the m% C in substance A is 37.5%. It reacts with substance B to form substances C and D. 4.0 x 10^16 (16th power) formula units of substance A weighs 4.26 microgram..
An evaluation of R was performed, following the procedure described in this module. The barometric pressure was 736 torr, the temperature was 295 K, and the volume of hydrogen gas collected was 35.6 mL. The calculated value of R was 82.1mL atm K-1..
Draw the structure of the product that is formed when (1R,3S)-3-methylcyclohexan-1-ol is treated with the following reagents
the iron in a 1.0000g rock sample is dissolved reduced to fe2 and titrated with dichromate. if the titration requires
If the density of N2 gas in a rigid flask is 0.243 g/L at 18 °C, what is the pressure of nitrogen in the flask if it is heated to 36 °C
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