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Leni [432]
3 years ago
12

A sample of tin (II) chloride has a mass of 0.49 g. After heating, it has a mass of 0.41 g. 

Chemistry
1 answer:
lyudmila [28]3 years ago
5 0

Answer:

16 percent

Explanation:

Just answered the question

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Which of the following would have the largest pKa?
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Answer:

CH3CH2NH3+/CH3CH2NH2 would have the largest pKa

Explanation:

To answer this question we must know Kb of CH3CH2NH2 is 5.6x10⁻⁴, and for C6H5NH2 is 4.0x10⁻¹⁰. And the CH3CH2NH3+ and C6H5NH3+ are related with these substances because are their conjugate base. That means:

pKa of  CH3CH2NH3+ =  CH3CH2NH2;  C6H5NH3+ =  C6H5NH2

Also, Kw / Kb = Ka

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pKa of CH3CH2NH3+/CH3CH2NH2 is:

Kw / kb = Ka = 1.79x10⁻¹¹

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pKa = 10.75

pKa of C6H5NH3+/ C6H5NH2 is:

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pKa = 4.6

That means CH3CH2NH3+/CH3CH2NH2 would have the largest pKa

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