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st 4 PartCHEM1212 Test 4 Answ Buflers: Calculate pHw EC12121Riverside DilenECT /

ID: 691908 • Letter: S

Question

st 4 PartCHEM1212 Test 4 Answ Buflers: Calculate pHw EC12121Riverside DilenECT /AppData/Local/Packages/Microsoft.MicrosoftEdge Bwekyb3d8bbwe/TempState/Downloads/EC1212LRiverside be able to deal with the problem at hand? Part 2. In preparing your report to Chemex, you've concluded that dilution is not a reasonable solution to the problem because of the vast quantities of water that would be required. You've now looking into the feasibility of neutralizing the waste streams, in order to meet the target pH range of 6.8-7.2. Hydrogen chloride gas and sodium hydroxide are the cheapest neutralization agents available to you Your task now is to decide how much of the appropriate agent it wo uld require to neutralize cach of the waste streams in question, and whether this pr fact, bring the plH of each waste stream into the range needed for compliance with the town council's mandate. In this report, you should address several issues for the readers: 1. What is meant by the term "neutralization"? 2. What equation describes this process for each case? Can you estimate an equilibrium constant for each? 3. What quantity of HCl or NaOH is needed to carry out each reaction? 4. Part 3 Back in Riverside, one of the town council members who's read your first two reports a feasible way to bring the pH into the allowed range What will the pH of the solution be after the reaction has been carried out? asks whether combining any of the waste streams before they're released into theri

Explanation / Answer

1. A neutralization reaction is the reaction in which an acid and a base react to form a salt and water and which also involves the combination of H+ ions and OH- ions to generate water.

The neutralization of a strong acid and strong base generally occurs at a pH equal to 7 which is the neutral pH value.

2. The following are equation which decribes the process:

HCl(aq) acid + NaOH (aq) base H2O(l) Water + NaCl (aq) Salt

When Strong acid like HCl react with strong base like NaOH it forms water salt in equilibrium reaction form

3. Equal quantity of Strong acid like HCl react with strong base like NaOH is used to carry out the reaction.

4. The neutralization of a strong acid and strong base generally occurs at a pH equal to 7 which is the neutral pH value. Thus, pH of the solution after the reaction is equal to 7