If 50.0 mL of a 0.1 solution of HOAc (Ka = 1.8 x 10^-5) has been titrated to the equivalence point with 0.1 M NaOH solution, what is the pH of the resulting solution? Please explain the math. Thanks.© BrainMass Inc. brainmass.com October 24, 2018, 5:50 pm ad1c9bdddf
For this question, you must get familiar with what I call ICE tables. Whenever you have titrations, you need to talk about moles as well. As for the equivalence point, you need moles of acid to equal moles of base.
M x volume = moles for each component
0.050 L x 0.1 M = 0.005 moles of HOAc, which means that I need 0.005 moles of NaOH, so I will need 50 mL of the 0.1 M ...
This solution calculates the level of pH acidity, given the equivalence point parameter.
How much energy, in joules, is released by an earthquake of magnitude 5?
Use the earthquake magnitude scale to answer the question.
1.) how much energy, in joules, is released by an earthquake of magnitude 5?
A) 7.9 x 10(13) joules
B) 2.5 x 10(9)joules
C) 7.9 x 10(11)joules
D) 7.6 x 10(11)joules
2.) how much energy, in joules, is released by an earthquake of magnitude 3.4?
A) 7.9 x 10(13)joules
B) 6.3 x10(7) joules
C) 3.1 x 10(9) joules
D) 3.0 x 10(9) joules
Use the pH scale to answer the question.
3) what is the hydrogen ion concentration of a solution with pH 6.5?
A) 3.2Ã-10 -6
B) 3.2Ã-10 -8
C) 3.2 x 10-7
D) 3.2Ã-10 -9
4) what is the pH of a solution with a hydrogen ion concentration of 0.00001 mole per liter? is this solution an acid or a base?
D) pH=6; acid
Provide an appropriate response.
5) use the 1960s peak annual growth rate of 4% and population of 4 million to predict the current growth rate with a Logistic model?assume a current country population of 9 million. ASsume the carrying capacity is 24 million.
A) 7.80 %
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