Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) When zeolite, which is hydrated sodium aluminium silicate is treated with hard water the sodiume ions are exchanged with - - Sarthaks eConnect

When zeolite, which is hydrated sodium aluminium silicate is treated with hard water the sodiume ions are exchanged with -

`H^+ ions`

`Ca^(+2) ions`

`SO_4^(–2) ions`

`OH^– ions`