I know that ions from salt bridge move into the half cell in order to maintain electrical neutrality. But in my book it's also given that ions move from half cell into the salt bridge.

For example, in a galvanic cell with $\ce{ZnSO4}$ and $\ce{CuSO4}$, zinc ions from zinc sulphate solution move into the salt bridge in one half cell and sulphate ions from $\ce{CuSO4}$ move into the salt bridge in the other half cell .

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    $\begingroup$ Of course they do. How else would the current go through the bridge? $\endgroup$ – Ivan Neretin Dec 27 '17 at 13:24
  • $\begingroup$ @IvanNeretin I thought the current flowed because of the movement of electrons through the wire. $\endgroup$ – Kxx Dec 27 '17 at 13:40
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    $\begingroup$ True, but you have to complete the circuit. Current can't flow to one side only. $\endgroup$ – Ivan Neretin Dec 27 '17 at 13:47
  • $\begingroup$ chemistry.stackexchange.com/questions/19540/… $\endgroup$ – Mithoron Dec 27 '17 at 17:23

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