Australia's Science Forum

Hi, i am try to neutralise hcl before pouring it down the sink - i have added NaOH - but it has gone the wrong way and has gone to ph11 - how do i bring it back to ph7 for safe disposal. thanks

thanks

Is it safe to rinse the droppers in 1mol hcl to clean out the NaOH, and still use them in the NaOH. I think that they might be some wax in the droppers and bottles, i have tried washing in water to no avail