Is the Combined Solution Acidic or Basic?

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Discussion Overview

The discussion revolves around determining whether a combined solution of hydrochloric acid (HCl) and barium hydroxide (Ba(OH)2) is acidic or basic after mixing. It involves calculations related to moles and the stoichiometry of the reaction between the two substances.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Technical explanation

Main Points Raised

  • A participant identifies barium hydroxide (Ba(OH)2) as the limiting reactant, suggesting that it will determine the outcome of the reaction.
  • Another participant prompts the need to convert the quantities of the reactants into moles and to write the balanced chemical reaction to analyze the situation further.
  • One participant questions which moles are significant in the context of the reaction, implying that the focus may need to shift from just Ba(OH)2 to other components involved in the reaction.

Areas of Agreement / Disagreement

Participants do not reach a consensus on which reactant is in excess or the implications of the moles involved in the reaction. Multiple viewpoints are presented regarding the significance of different reactants.

Contextual Notes

The discussion lacks clarity on the specific calculations and assumptions made regarding the moles of each reactant and the balanced equation for the reaction.

Zoey Brown
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Homework Statement


A student has 250ml of 1.5M HCl and 150ml solution of 2.0M Ba(OH)2. When he mixes the 2 together, is the combined solution acidic or basic?

Homework Equations


n=cv
ph=-log[h]

The Attempt at a Solution


the limiting reactant is Ba(OH)2. it is .3 moles which means bacl2 will also be .3 moles
 
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Which reactant is in excess?

Change each quantity to moles. Write the reaction. Use ratios according to the written reaction and compare to the moles you started for each reactant.
 
H'm yes, but moles of what? When he writes the reaction as you suggest he may well see that it's not the moles of "Ba(OH)2 or of Ba that most matter. :oldwink:
 
epenguin said:
H'm yes, but moles of what? When he writes the reaction as you suggest he may well see that it's not the moles of "Ba(OH)2 or of Ba that most matter. :oldwink:
BOTH of them
 

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