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Buffer Chemistry Question! Please help!?
1) Find the pH of a solution that is 0.12 M in nitrous acid and 0.15 M in sodium nitrate. Answer in units of pH. (Ka of nitrous acid = 4.5 x 10^-4)
2)Now we add 0.15 mol of NaOH to 1.00 liter of the solution that was given in part 1. What is the pH of the solution after the NaOH addition?
3)Now, you're given only 500 mL of the buffer described in part 1 above. To this, 121 mL of 0.50 M HCl is added. What is the new pH of this new solution?
For octane and ethanol, how many moles of liquid are there in the same 54L of volume?V= 54L , P=180 atm, T= 298 K
How many grams of potassium acetate must be added to 2.5 L of 0.250 M acetic acid to obtain a buffer at pH = 4.26
Magnesium metal reacts with hydrochloric acid to form magnesium chloride and hydrogen gas. Suppose we react an excess of magnesium metal with 20.0 ml of a 3.00M solution of hydrochloric acid and collect all the hydrogen in a ballon at 25C and 1.5 ..
In a sample, 90.92% of the atoms are Ne-20, 0.26% of the atoms are Ne-21, and 8.82% of the atoms are Ne-22. Using a sample population of 10 000 neon atoms, calculate the average atomic mass of the neon.
write net ionic equations for the following molecular equations. hbr is a strong electrolyte. include states-of-matter
1)When CH4(g) reacts with H2O(g) to form H2(g) and CO(g), 206 kJ of energy are absorbed for each mole of CH4(g) that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.
Find the values of K for the equilibria established when aqueous solutions of the following are mixed.
when a 45 g sample of an alloy at 100 c is dropped into 100 g of water a 25c the final temperture is 37 c. what is the
Write chemical equations showing how each of the following weak bases ionizes water to form OH-. With NH3
Solutions of hexane and heptane may be considered to be ideal. At 25°C, the vapor pressure of pure hexane is 20.3 kPa and the vapor pressure of pure heptane is 6.08 kPa The activity relative to a pure liquid standard state is defined as the ratio ..
Determine the molecular mass and its uncertainty for CH3CH2COOH. Note: Pay attention to significant figures and use the atomic masses given in the table.
A buffer is prepared by mixing 453 mL of 0.143 M HCl with 983 mL of 0.848 M ammonia (NH3). Given that the Kb of NH3 is 1.8 x 10-5, calculate the pH of the solution.
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