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juin [17]
2 years ago
9

How many grams of KOH are required to make 125mL of a .500M solution?

Chemistry
1 answer:
Bumek [7]2 years ago
3 0

Answer:

Answer:3.51 g

Explanation:

M(KOH)= 39.10 + 16 + 1.008 = 56.108 g/molAmount of substance is n= m/M = cV and mass m= McVolume in litres is 0.125 l

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A 50.51g sample of a compound made from phosphorus and chlorine is decomposed. Analysis of the products showed that 11.39 g of p
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<u>Ans: P = 22.5% and Cl = 77.5%</u>

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<u>Given:</u>

Total Mass of sample containing P and Cl = 50.51 g

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<u>To determine:</u>

Mass % of P and Cl

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Mass % of a given element in a total mass is generally expressed as:

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Total mass = mass of P + mass of Cl

mass of Cl = Total - mass of P = 50.51-11.39 = 39.12 g

% P = [11.39/50.51]*100 = 22.5%

%Cl = [39.12/50.51]*100 = 77.5%

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