Acid-Base Titration

 

Objective: To determine the concentration of an unknown acid and an unknown base.
Background: An acid-base titration is a quantitative analysis of acids and bases. Through this process, an acid or base of known concentration neutralizes an acid or base of unknown concentration.
The titration progress can be monitored by visual indicators, pH electrodes, or both. In this exercise you will add an indicator to determine the equivalence point.
The reaction’s equivalence point is the point at which the titrant has exactly neutralized the acid or base in the unknown analyte. If you know the volume and concentration of the titrant at the equivalence point, you can calculate the concentration of a base or acid in the unknown solution.
Procedure: Record your observations in the data table.

1. Place two 50.0 mL burettes, 0.1M NaOH, 0.1M HCl, unknown acid, unknown base, and phenolphthalein indicator onto the workbench.
2. Fill the burette with 50.0 mL of 0.1 M NaOH.
3. Add 0.1 M NaOH to the unknown HCl until the pH of the solution reaches 7.0. (Perform a “range finding” trial by adding 5 mL increments. When you have an idea of the amount of NaOH to add, perform three trials with at least 0.1 mL precision.)
4. Record the data for three trials. (You will need to add more NaOH to the burette to perform additional trials. Add more flasks of 0.1M NaOH to the workbench as needed.) Calculate the average concentration for the three trials.
5. Fill the other burette with 0.1 M HCl.
6. Titrate the unknown NaOH with the 0.1 M HCl until the pH of the solution reaches 7.0. (As previously, perform a range finding trial and three trials with at least 0.1 mL precision.)
7. Record the data for three trials. (As with the base, you will need to add more HCl to the burette to perform additional trials. Add more flasks of 0.1M HCl to the workbench as needed.) Calculate the average concentration for the unknown NaOH.

Acid-Base Titration
DATA TABLE
Show one Molarity calculation
RUN #1 RUN #2 RUN #3
ENDING BURETTE READING (ACID)
STARTING BURETTE READING (ACID)
VOLUME OF ACID USED
MOLARITY OF ACID (from flask)
MOLARITY OF BASE (calculated)
AVERAGE BASE MOLARITY

ENDING BURETTE READING (BASE)
STARTING BURETTE READING (BASE)
VOLUME OF BASE USED
MOLARITY OF BASE (from flask)
MOLARITY OF ACID (calculated)
AVERAGE ACID MOLARITY
Acid- Base Titration Lab Report

Purpose of Lab:

Sample Solution

An acid-base titration is an experimental procedure used to determined the unknown concentration of an acid or base by precisely neutralizing it with an acid or base of known concentration. This lets us quantitatively analyze the concentration of the unknown solution.Acid-base titrations can also be used to quantify the purity of chemicals. ·
An acid-base titration is a quantitative analysis of acids and bases; through this process, an acid or base of known concentration neutralizes an acid or base of unknown concentration.The titration progress can be monitored by visual indicators, pH electrodes, or both.

o “essential material needs” (2010: 4), thereby sheltering policymakers from the public scrutiny associated with sweeping economic reform policies like privatizations, capital liberalization, and cuts in long-term government spending. Disasters create a shock in the public realm, a kind of disorientation where policy space is made available and must be acted upon immediately before the public regains their collective clarity and sense of normalcy.

Hurricane Katrina proved to be a watershed moment in the conceptualisation of Klein’s “disaster capitalism complex.”

Katrina was a category 4 storm, surging over 6 metres in height that made its landfall on the U.S. Gulf Coast on August 29, 2005. It is estimated to have impacted approximately 90,000 square miles throughout southern Louisiana, Mississippi, and Alabama, displaced between 1-1.5 million people (with nearly half of those coming from New Orleans), killed more than 1,800 people, and exceeded $80 billion in costs (Button and Oliver-Smith 2008:123; Cutter et al. 2006:8; Elliot and Pais 2006:302). The handling of Hurricane Katrina relief efforts by the Bush government was dubbed an administrative failure over the years (Eikenberry, Arroyave, Cooper 2007: 160; Dreier 2006) However, his administration was cunning enough to use the catastrophe for financial gain, in one of the most blatant instances of disaster capitalism in recent years. In the aftermath of the disaster, the administration sought to remove tax breaks for small business, lodge suggestions that the Environmental Protection Agency (EPA) forgo environmental statutes such as the Clean Air Act, waive preconditions of affirmative action for contractors, and lift the cap on the number of work hours for truck drivers (Dreier 2006). Bush’s government, buoyed by Republican congressmen also pursued $50 billion in cuts of public expenditure on social services for the poor such as Medicaid, child care, food stamps and Supplemental Security Income (Dreier 2006). It rescinded rules capping the number of hours truckers can work. Firms and corporations with linkages to the government were added no-bid contracts for the rebuilding and reconstruction work. Firms and large corporations with political connections reaped big. Halliburton earned $ 124.9 million from contracts with the Department of Defence, FEMA, the US Navy and Army Corps of Engineers (Halliburton Watch 2005; Adams, Hattum and English 2009: 629). This was despite the fact that Halliburton botched its performance in Iraq and underwent 20 investigations for purported crimes such as bribery, vote rigging, overcharging (Adams, Hattum and English 2009: 629). However, the firm’s close relationship with the Bush administration played strongly to their advantage. The U.S construction industry furnished the R

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