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2022 hsc q 35 (1 Viewer)

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I get ksp=0.137 but i didnt use the dried weight of precipitate.
 
wizzkids

wizzkids

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Nah, that can't be right. Strontium hydroxide is not that soluble. I calculated a value of 3.09 x 10^-4 which seems to agree with the literature value. Have a look at my working (attached).
 

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ahh i see so ksp only applies to the solution and you have so you have to subtract the moles of sr and oh in the solid precipitate from the solution, right?
 
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