From the calculations, the pH of the buffer is 3.1.
<h3>What is the pH of the buffer solution?</h3>
The Henderson-Hasselbach equation comes in handy when we deal with the pH of a buffer solution. From that equation;
pH = pKa + log[(salt/acid]
Amount of the salt = 25/1000 * 0.50 M = 0.0125 moles
Amount of the acid = 75/1000 * 1.00 M = 0.075 moles
Total volume = ( 25 + 75)/1000 = 0.1 L
Molarity of salt = 0.0125 moles/0.1 L = 0.125 M
Molarity of the acid = 0.075 moles/0.1 L = 0.75 M
Given that the pKa of lactic acid is 3.86
pH = 3.86 + log( 0.125/0.75)
pH = 3.1
Learn more about pH:brainly.com/question/5102027
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Answer:
the answer is 11
Explanation:
Ok, let us understand what is an atomic number, an atomic number is simply the proton number, the atomic number is always seen at the bottom left corner in a element of a periodic table, it is the number of proton in a atom of a certain element.
Answer:-
399 gram
Explanation:-
The balanced chemical equation for the reaction is
4Fe +3 O2 --> 2 Fe2O3
Atomic mass of Iron Fe is 55.845 gram
Molecular mass of Iron (III) Oxide Fe2O3 is
55.845 x 2 + 16 x 3 = 159.69 gram
From the balanced chemical equation,
4 Fe gives 2 Iron (III) oxide
∴ 4 x 55.845 grams of Fe gives 2 x 159.69 grams of Iron (III) Oxide.
279 grams of Fe gives (2 x 159.69) x 279 / ( 4 x 55.845)
= 399 gram
2NaOH+H2SO4--> Na2SO4+2H2O
80g NaOH(40g/mol)--> 36g H2O (18g/mol)
65.5 x (1/40g/mol)= 1.64 moles of NaOH
1.64 x 18g/mol= 29.5 g H2O
