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Hitman42 [59]
3 years ago
13

Can someone confirm that this is right?

Chemistry
1 answer:
Free_Kalibri [48]3 years ago
3 0
Sorry idk the exact answer but i'm pretty sure its right and if it's not it's C
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How will you known that you have reached the equivalence point when titrating the NaOH solution with HCl?
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When the solution (with phenolphthalein) changes to colorless

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What is the percent by mass of water in Na S04.10H20?
dalvyx [7]

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Explanation:

                    First of all calculate the mass of hydrated compound as,

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Mass of Sulfur = S × 1 = 32.06 × 1 = 32.06 g

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Secondly, calculate mass of water present in hydrated compound. For this one should look for the coefficient present before H₂O in molecular formula of hydrated compound. In this case the coefficient is 10, so the mass of water is...

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Now, we will apply following formula to find percent of water in hydrated compound,

           %H₂O  =  Mass of H₂O / Mass of Hydrated Compound × 100

Putting values,

                                      %H₂O  = 180.2 g / 322.24 g × 100

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