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A buffer solution was formed by mixing 20.0 cm^3 of sodium hydroxide solution of concentration 0.100 mol dm^–3 with 25.0 cm^3 of ethanoic acid of concentration 0.150 mol dm^–3. CH3COOH + NaOH---CH3COONa + H2O Calculate the pH of this buffer solution.

Ka for ethanoic acid = 1.74 × 10–5 mol dm –3 also given in question. moles = concentration x volume / 1000Ka = [H+] [A-]/[HA]pH = -log [H+] initial moles:NaOH: 20x0.1/1000 = 0.002molCH 3 COOH: 25 x 0.15 / 10...
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what does the atomic number show in the periodic table ?

atomic number shows the number of protonsand proton number = the number of electrons so the overall charge of an atom is neutral.
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Answered by Marwa A. • Chemistry tutor
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How do anti-bumping granules work?

Anti-bumping granules prevent explosive boiling, as they provide a large surface area for bubbles to form on.
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NaOH has a high melting point and conducts electricity in solution. H2O has a low melting point and does not conduct electricity. Explain, using the structure of each, why this is the case.

NaOH is an ionic compound with strong electrostatic attraction between the oppositely charged ions . This means the melting point is high, as the bonds need a lot of energy to overcome. When dissolved, the i...
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Suggest why the concentration of sodium hydroxide in a solution slowly decreases when left open to air

NaOH reacts with carbon dioxide in open air
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Answered by Adam K. • Chemistry tutor
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