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A buffer solution was dissolved by adding 5.45 g sodium formate (Molecular weight of HCOONa is 68.008 g/mol) in 250 mL of 0.30 M formic acid (HCOOH) solution (Ka = 1.8×10-3).
(a) Assuming no volume change, calculate the pH of the buffer solution using the Henderson-Hasselbalch equation.
(b) Calculate the pH of the above buffer solution after adding 15.0 mL of 1.0 M potassium hydroxide (KOH).
The pressure gauge on a 20.0 m3 tank of nitrogen at 25 C reads 10 bar. Estimate the mass of nitrogen in the tank by : (a) Direct solution of the ideal gas equation of state. (b) Conversion from standard conditions.
I don't understand don't we draw a lewis structure first and add 2 lone pairs to complete the octet making it a tetrahedral. how does it only have 3 covalent bonds
We add R12 to the tank until the final mass of R12 inside the tank is 80 kg. If the temperature remains constant, what is the volume occupied by the liquid in the final state. How much mass of R12 was added to the tank
Which of the following compounds will produce an acidic solution when dissolved in water? What is the OH- (hydroxide ion) concentration in a solution with pOH = 2.45.
Calculate the number of moles of NaOH in the Solution. 0.0395 moles Calculate the value (calories) for the heat of solution. -343 cal Calculate the ?Hsolution for sodium hydroxide
vinegar is a solution ofacetic acid ch3cooh dissolved in water. a 5.54-gsample of vinegar was neutralized by 30.10 ml
question how many grams of naphthalene c10h8 must be added to 25.00 g of ccl4 so that the vapor pressure of ccl4 over
The wave function for the ground state of a hydrogen atom is Ne-r/a0, Find out the normalization constant N.
Determine the rate law for the reaction and calculate the rate constant.
The mass of an average blueberry is 0.72 g and the mass of an automobile is 1900 kg. Find the number of automobiles whose total mass is the same as 1.0 {rm mol} blueberries.
If 8.6 L of NO is combined with excess O2 at STP, what is the volume in liters of the NO2 produced?
How much heat (in kJ) is needed to convert 866 g of ice at -15 degress celsius to steam at 146 degrees Celsius? (The specific heats of ice and steam are 2.03 and 1.99 J/g x C respectively)
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