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vg.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator-assignment-take&takeAs; onLocator assignment-take This question has multiple parts. Work all the parts to get the most points. A buffer solution with a pH of 12.12 consists of Nas PO4 and Nag HPO4 The volume of solution is 200.0 mL K, for HPO-is 3.6 x iO-13 Which component of the buffer is present in a larger amount? NagPO Na HPO4 D if the concentration of Nas PO. is 0.320 ?, what mass of Na2HPO4 is present? Mass 18.97 g Which component of the buffer must be added to change the p?l to 12.37? Na2 HPO4 d The concentration of Nas PO, is 0.320 M. What mass of NasPO, is required to change the p?H to 12.37? Mass-11864-je An error has been detected in your answer. Check for typos, miscalculation ns etc. before submitting your answr Submit Previous Nexd

Explanation / Answer

Concentration of Na3PO4 = 0.320 mol/L

Volume = 0.200 L

Moles of Na3PO4 = concentration x volume

= 0.320 mol/L x 0.200 L

= 0.0640 mol

Mass of Na3PO4 = moles x molecular weight

= 0.0640 mol x 163.94 g/mol

= 10.492 g

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