nany grans of Naoil munt be pregent in a lite ution whose\' -ion eoneent ration
ID: 694128 • Letter: N
Question
nany grans of Naoil munt be pregent in a lite ution whose' -ion eoneent ration in 2.0 x 103 ? 0.56 g 0.64 h. 5.0 x 10-12 The value of the autoionization constant for water changea as the teaperature changes. At 60 C, tor example, the value is 1.0 x 10-13 What 1 of pure water at 60°C? a temperature of b. 4.5 c. 5.0 d. 5.5 6.0 t. 6.S 7.0 7.5 A poap solution is about ten tsmes more basic than pure waterWhat is a possible value for the pH of chis soap Bolution? b. 3,0 e. 5.0 d. 6.0 e. 7.0 B. D 9.0 1. 13.0 j. 14.oExplanation / Answer
1)
volume , V = 1 L
[OH-] = [NaOH] = 2.0*10^-3 M
we have below equation to be used:
number of mol,
n = Molarity * Volume
= 0.002*1
= 2*10^-3 mol
Molar mass of NaOH = 1*MM(Na) + 1*MM(O) + 1*MM(H)
= 1*22.99 + 1*16.0 + 1*1.008
= 39.998 g/mol
we have below equation to be used:
mass of NaOH,
m = number of mol * molar mass
= 2*10^-3 mol * 39.998 g/mol
= 8*10^-2 g
Answer: 0.08 g
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