Question

how to calculate concentrarion for last 2 bottom boxes

PH Study Data Sheet Name of Lab Partners Part A: Acids and Bases Action Unknown Unknown number Concentration of unknown shown on label ho OM Predicted pH of unknown if it is a strong acid Predicted pH of unknown It is a strony buse Measured pH of unknown 1.31 Indicare if the unknown is a strong acid, weak acid, strong base, or weak buse 111.18 weak Base 6.681012m Concentration of HO from measured pH ] 10-131 ſ 14+7 ] 10.30 ? 10.32.5011872336 .046977781 PH = -log [ht 11.15=-19 [H+ 10 Phá Hà 6.6*10*2 10-11.15

Answer 1

Yes, you are right. You are going in a right track.
ruan We know that pH is the negative logarithan of TH+] cosi in a solution. But Ht con in ă solution always present as a hydro- neuon ([430*1 com. (Hot Ht ot). so pH = -log[ht] = -2og [H3O+] so, [Bot] = Lop cs Scafroonwithe measured pH value we can calentate the concentration of hot. ner

[H+] = 10-1.31 =0.049 M pH = -23 [] 0.30 = -2724t? TH7 ] = 10+ 0.30 5.0.5011 M Here the pH is 0.30 which is near to o So, we can call it a strong acid 7 (4+] = concentration of Ht ron Elueanhea concentration of _ CamScanner llot zom 1 Here , .pth = 1.31, 24 x ogo ost o 1.( predicted pH score if it is strong acid = 1) So, it is also a strong acid.
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