# Design Lab Water and Alka-Seltzer Essay

1177 Words Nov 20th, 2012 5 Pages
Amount of Water

Colin Lee
Dr.Cooper
Chemistry 12

Introduction: Alka-seltzer contains three active ingredients, aspirin, sodium hydrogen carbonate and citric acid. It is used for headaches, migraines, and cold and flu symptoms. Alka-Seltzer is usually taken when dissolved in a glass of water. When placed in water a series of chemical reactions result into Sodium citrate and Sodium acetylsalicylate. The sodium citrate would act as the antacid for stomach pains, and the sodium acetylsalicylate would act as the pain reliever.
Research Question: This investigation will determine the how the amount of water (independent variable) affects the amount the amount of time (dependent variable) it takes for the Alka-Seltzer to dissolve.
We must choose the largest error we find.

This error yielded a much larger error than 0.22s so we must use +/- 8.22 as our absolute error.

Qualitative Observations * Tablet was chipped * When the tablet was dropped water splashed out * Hard to know when reaction finished * The mass of Alka-Seltzer might have been different
Analysis:
The attached graph shows the proportionality of the amount of water to the amount of time it took to complete the reaction
In order to figure out the proportionality we must calculate the slope.

Calculation of proportionality constant:

Therefore the equation that represents the proportionality between the amount of water and the reaction time would be:

Where T is time and W is amount of water.
Error Analysis
In order to find error with our proportionality we must add error bars into our graph. [Note: Our error bar in the x direction was set to 3 because the error in the graduated cylinder was 1%, so we took the largest value and used that as our error. The error in the y direction was from using the range method above]
To find the error in the proportionality constant we must use k-high and k-low, being the steepest and shallowest slope. Using these we subtract them and divide by 2.

Therefore the new equation for the proportionality is

Our relative error is now

Conclusion and Evaluation
We determined that the proportionality between the time it took and the amount of water

## Related Documents

• ###### Essay Bio 156 Lab

LAB 1 1. Describe the function of the following pieces of safety equipment and how each might be used: (10 points) a. Eye Wash (2 points) In the event of a chemical splash to the eyes, flood the eyes for at least 15-30 minutes with water. Flush from the eye outward. If you were not wearing proper eye wear, a chemical could splash into your eye and would make it necessary to use this. b. Fire Blanket (2 points) Used in order to put out a small fire. If a small area of the lab caught…

Words: 1390 - Pages: 6
• ###### Lab Report Testing the Hardness of Water Essay

Lab Report Testing the Hardness of Water Water is the most important molecule that exists on the Earth. Without water living beings would not be able to live. Water is used for an immeasurable number of things. There are many properties of water, which makes this molecule so unique. One which people overlook is hardness. Hardness is defined in the Chemistry: The Central Science by Prentice Hall's as being "water that contains a relatively high concentration of Ca2+, Mg2+, and other divalent cations…

Words: 1640 - Pages: 7
• ###### How Much Co2 Lab Essays

How much CO2? Introduction The goal of this lab was to determine the amount of grams of sodium bicarbonate (NaHCO3) required to produce enough CO2 gas to completely fill the lab and also how many Alka-Seltzer tablets that would equate to. This was done by collecting CO2 gas by inverting a buret and submerging it under water in order to calculate the volume of CO2 released from a fragment of Alka-Seltzer tablet. The main component of Alka-Seltzer is sodium bicarbonate, used to neutralize excess…

Words: 1231 - Pages: 5
• ###### Slime Design Lab Essay

Slime Design Lab: Investigate how you can vary the properties of slime  This report will investigate if and how the concentration of sodium borate affects the viscosity of a sample of slime. Background Information: Both natural and synthetic polymers are a vital part of our daily lives. Natural polymers are found in rubber, skin, hair etc. Synthetic polymers are found in nylon, polyester, plastic, chewing gum etc. This lab is demonstrating the properties of the common synthetic polymer…

Words: 2025 - Pages: 9
• ###### Essay Hard Water Lab Report

Lab Report: Hard Water Purpose: The purpose of this lab is to determine whether a liquid is hard water or not. Background: Hard water is the water that has a high amount of mineral in it, usually Ca2+ and Mg+. These cations enter the source of water by leaching from minerals within a wet underground layer of water- bearing rock, or an aquifer. According to the WHO, hard water is not harmful to human’s health but it’s a serious problem in the water industry. Household plumbing and appliances…

Words: 1033 - Pages: 5
• ###### Design Lab Water and Alka-Seltzer Essay

Amount of Water Colin Lee Dr.Cooper Chemistry 12 Introduction: Alka-seltzer contains three active ingredients, aspirin, sodium hydrogen carbonate and citric acid. It is used for headaches, migraines, and cold and flu symptoms. Alka-Seltzer is usually taken when dissolved in a glass of water. When placed in water a series of chemical reactions result into Sodium citrate and Sodium acetylsalicylate. The sodium citrate would act as the antacid for stomach pains, and the sodium acetylsalicylate…

Words: 1177 - Pages: 5
• ###### Scientific Analysis on Enthaply Vaporization of Water Lab Essay

throughout “Enthalpy Vaporization of Water”. First of all, the purpose of this lab was to determine the water’s vapor pressure at different temperatures as well as to measure the molar heat of vaporization of water using the Clausias Clapeyron equation. The first concept out of many represented in this lab is the ideal gas law. The ideal gas law is used to get the number of moles of air trapped in the 10 mL graduated cylinder. Once we cooled the system so that water vapor is extremely minute, and then…

Words: 748 - Pages: 3
• ###### Essay on The rate at which Alka-Seltzer tablets reacts with water

The rate at which Alka-Seltzer tablets reacts with water Statement of problem The aim of the experiment is to find out the rate at which Alka-Seltzer tablets react with water. The input variable that I will change is temperature. The output variable will be measured by the time it takes for the Alka-Seltzer tablets to dissolve. Input variables In this experiment there are two main factors that can affect the rate of the reaction. These key factors can change the rate of the reaction by either…

Words: 3771 - Pages: 16
• ###### Essay on Formula of a Hydrate Lab

Formula of a Hydrate Lab Design: Problem: What is the chemical formula for a hydrated copper (II) sulphate compound? Controlled Variable: The mass of hydrated copper (II) sulphate. Responding Variable: The mass of dehydrated copper (II) sulphate, mass of H2O Materials: Ones on the handout + Hot plate. Procedure: 1. Mass 3.00g of hydrated copper (II) sulphate using electronic balance 2. Measure the mass of a thin, crucible dish using electronic balance 3. Gently pour hydrated…

Words: 606 - Pages: 3
• ###### Essay Heat: Temperature and Water

Heat and Energy Transfer Lab Materials needed: Part 1: bowls (not included in the lab kit; use cooking pots or plastic containers- something large enough to fit your hand) ice (not included in the lab kit) thermometers Part 2 test tubes – use three similar glasses or cups water various household materials for insulation stove or microwave to heat up water Part 1: Heat transfer and human sensation 1. Pour warm water in the bowl on the left, cold water in the bowl on the right,…

Words: 1000 - Pages: 4