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$1.$ When solid sodium sulfate dissolves, it dissociates into its component ions:

Na$2$SO$4($s$)->2$ Na$+($aq$)+$ SO$42-($aq$)$

Assume you repeated the experiment using Na$2$SO$4$ instead of NaCl. If the buret was used to dispense $25\mathrm{.}00$ mL of $0\mathrm{.}1408$ M Na$2$SO$4$ solution, calculate the following:

a$)$ What is the concentration $($molarity$)$ of sodium ions, Na$+($aq$)?$

b$)$ How many moles and how many grams of sodium ions were dispensed?

c$)$ What is the molarity of the sulfate ions, SO$42-($aq$)?$

d$)$ How many moles and how many grams of sulfate ions were dispensed?