The different methods of measuring acids and bases in a solution By Starsky Intro to Biology September 26‚ 2011 Lab Partners: Kristen‚ Tania and Betty Introduction When using different methods to measure pH levels there are some tools that can be useful. Some more than others but by putting into action the different methods it may determine which tools will work best and give the best
Premium PH
REPORT WRITING: ORGANIZING AND OUTLINING LEARNING OBJECTIVES: Week 4 To appreciate the complex nature of organizing information and content in report writing To understand further the critical role of PPQ in report writing I NTRODUCTION In the planning stage‚ you have been introduced to the concept of PPQ – Problem‚ Purpose and Questions – as the main driving force of your report writing. If your PPQ is not formulated well‚ chances are your report will not make sense
Premium Critical thinking Singapore
this experiment‚ I am trying to achieve an extraction of paracetamol from a commercial branded product. To test the purity I will find the melting point of the paracetamol. I will also be comparing my yield of paracetamol to the commercial tablets content of paracetamol as said on the packaging. EQUIPMENT • 2 paracetamol tablets • Propanone • 100cmᶟ conical flask x2 • 25cmᶟ measuring cylinder • Warm water bath • Filter funnel and filter paper • 100cmᶟ beaker • Pipette • Small piece of cotton wool
Premium Chemistry Oxygen Water
Alyssa Caparelli Organic Chemistry 12A Professor Alston October 28‚ 2014 Isolation of Chlorophyll and Carotenoid Pigments from Spinach Purpose The purpose of this experiment was to isolate ß-carotene‚ chlorophyll-A‚ and chlorophyll-B from spinach using column chromatography. Spinach was dehydrated using ethanol‚ and the pigments were extracted with dichloromethane. The spinach extracts were dried using CaCl2. Then‚ the solid pigments were run through a column using a non-polar solvent‚ hexane
Free Solvent Acetic acid Ethanol
Goal(s): To study the effect of concentration on the rate of a reaction‚ and to find the order of the reaction in each reactant and write a rate equation. Background Theory: Chemical reactions occur at different rates that ultimately depend on their concentration‚ the temperature‚ the usage of catalysts‚ the nature of reactants‚ like the surface area of the particles. Concentration‚ for instance‚ increases the number of molecules or particles in a certain volume‚ so collisions will become more
Free Chemical reaction Chemical kinetics Chemistry
will pass through the solution and strike a photocell. The CuSO4 solution used in this experiment has a deep green color. A higher concentration of the colored solution absorbs more light (and transmits less) than a solution of lower concentration. [Content Standard B- Structure and properties of matter] The colorimeter monitors the light received by the photocell as either an absorbance or a percent transmittance value. Figure 01 picture of colorimeter - (3.imimg.com‚ 2017) Beer lambert law:-
Premium Chemistry Chemical reaction Oxygen
oxygen‚ carbon dioxide‚ helium‚ and lab gas. We took a Ziplock bag‚ and turned into a non-stretchy balloon‚ and filled with each gas and measured the apparent mass then calculated the actual mass‚ then find a ratio between the mass of oxygen and the other gasses. We tried to keep the pressure about the same each time so our calculations would be more accurate. We found out that the heaviest was carbon dioxide‚ and the lightest was helium. In fact‚ helium and lab gas had a density below 0. Anyways
Premium Oxygen Carbon dioxide
Celestial Geography I Emily Richarz PH090-04 Purpose: The purpose of this lab was to introduce us to star charts and how to use them to find stars‚ constellations and other bodies in the sky. Procedure: The instructor gave a brief but thorough lecture and demonstration on how to go about finding the answers on the worksheet. We then filled out the worksheet that cover finding stars and constellations using right ascension and declination in general and on specific dates‚ where constellations
Premium Sun Star
waking hours. Since my youth‚ I am suffering with this disorder‚ by personal experience‚ I decided to analyze the correlation between the excessive nocturnal perspiration and the kind of food that I eat before go to sleep. The premise of my experiment is based on my perception‚ I noticed that if I eat some food after 7 pm‚ taking account that I usually go to bed after 10 pm‚ I have 60% of probability to have an excessive perspiration during the night‚ this probability increase
Premium Sleep Sleep deprivation Sleep disorder
The properties of dibenzalacetone make it a great substance to be used when protecting the skin from the sun. In the experiment performed‚ dibenzalacetone was created from an aldol condensation of 2 portions of benzaldehyde and acetone in sodium hydroxide. The reaction that occurred in this experiment is known as a specific aldol condensation called Claisen-Schmidt. In the reaction‚ the carbonyl of benzaldehyde reacts quickly with the acetone anion to create a hydroxyketone that dehydrates in the
Premium