Science

Aim - To observe a neutralization reaction 
Equipment - A test tube, test tube rack, 1 mol L-1 Na-2 CO-3 (sodium carbonate) , 1 mol L-1 HCI (hydrochloric) , dropper or dropper bottle , universal indicator solution.

Method - method. 1 : a procedure or process for attaining an object: such as. a(1) : a systematic procedure, technique, or mode of inquiry employed by or proper to a particular discipline or art. (2) : a systematic plan followed in presenting material for instruction the lecture method.

observation - universal indicator HCI = The liquid in the graduated cylinder at the beginning contained hydrochloric acid, which is an acid that causes the indicator to turn red. The sodium carbonate solution that I added into the cylinder is a base, so it causes the solution at the bottom to turn blue.

So, Hydrochloric acid turn universal indicator into red colour