Determine whether the stopcock should be completely open, partially open, or completely closed for each activity involved with titration. Close to the calculated equivalence point of a titration Conditioning the burette with titrant Filling the burette with titrant At the beginning of a titration

The answer is 4 i don't know if its right let me see.

Hbr dissociates to form h+ and br-ca(oh)2 dissociates to form ca2+ and 2oh-the h+ and oh- react to form waterassuming the reactants are dissolved in water, the net reaction is h+ + oh- —> h2oif you’re asked to show all components of the reaction, the complete reaction is 2hbr + ca(oh)2 —> cabr2 + 2h2o