Indicactor Lab: What is in each Test Tube?

Length: 436 words (1.2 double-spaced pages)
Rating: Excellent
Open Document
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Text Preview

More ↓

Continue reading...

Open Document

What is in each test-tube? What proof do I have of this?

Test-tube A: Test-tube A had water in it. I can base this on the fact that it was a neutral, reacting neither to red or blue litmus paper. Phenolphthalein also did not react to this substance. The pH value was 7, neutral, also adding to the proof that this substance was water, because water is neutral. The substance was clear and odorless, and all of these reactions combined led me to my conclusion of substance A being water.

Test-tube B: Test-tube B had spoiled milk in it. The substance reacted to blue litmus paper, and red litmus paper underwent no change. Phenolphthalein did not change, and the pH value was 6, a weak acid. The appearance of this substance was a thick, white liquid that had a horrible odor. These observations led me to my conclusion that substance B is spoiled milk.

Test-tube C: Test-tube C had ammonia in it. The substance reacted to red litmus paper, and it had no effect on blue litmus paper. Phenolphthalein turned a hot pink color very quickly, and the pH value was about 11.5. The substance was clear and had a strong odor to it. These results led me to my conclusion that substance C is ammonia.

Test-tube D: Test-tube D contained lemonade. The substance reacted to blue litmus paper, and red litmus underwent no changes. It had no effect on Phenolphthalein, and its pH value was 3, a strong acid. Knowing that lemons are very acidic, and that the substance was yellow and sweet smelling, I concluded that substance D was lemonade.

Test-tube E: I could not come to a conclusion on what substance E was. It reacted weakly to blue litmus paper, and it did not change red litmus. It had no effect on Phenolphthalein, but its pH value tested as 7. This cannot be correct however, because all acids have a pH value less than 7. The appearance and smell were not of any help, because it was a clear substance with a slight odor I couldn’t key in on.

How to Cite this Page

MLA Citation:
"Indicactor Lab: What is in each Test Tube?." 24 May 2017
Title Length Color Rating  
Lab Test: Unknown Bacterium Essay - INTRODUCTION The purpose of this investigation was to identify an unknown bacterium. “At any time there are millions of bacteria living around, on, or inside us” (The Plague). Bacterium can’t be identified by merely looking at it. Many bacteria have the similar appearances in growth. “In most cases, detection is based on the reaction of an enzyme with a certain substrate” (Sigma-Aldrich). Identification is usually based on the results of the bacterium’s cells metabolic capacities. Some bacteria are harmless and are part of our normal flora....   [tags: Biochemical Testing, Illness]
:: 6 Works Cited
1561 words
(4.5 pages)
Powerful Essays [preview]
Two Point Discrimination Test Essay examples - In this lab we apply the technique known as a two point discrimination test. This test will allow us to determine which regions of the skin are best able to discriminate between two simultaneous sensory impulses. According to (Haggard et al. 2007), tactile discrimination depends on the size of the receptive fields located on the somatosensory neurons. However receptive fields for other types of sensations are located elsewhere. For vision we find that the receptive fields are located inside the visual cortex, and for hearing we find receptive fields in the auditory cortex....   [tags: Lab Analysis] 762 words
(2.2 pages)
Better Essays [preview]
Essay on Strategies for Overcoming Test Anxiety - Anxiety can be defined as a state of uneasiness and nervousness resulting from the fear of unknown or the anticipation of some threatening event or situation. It can also be taken as a generalized mood or condition of mind that results from some unidentifiable cause or stimulus that is supposed to bring on some negative outcomes of certain possible future event/s or to simplify the whole idea, one can say that anxiety is the feeling of being worried about what may / will happen. This restlessness or uneasiness of feeling leads to various psychological and physiological disorders such as loss of appetite, loss of sleep, headache, palpitation, sweating, trembling etc....   [tags: test and testing] 622 words
(1.8 pages)
Better Essays [preview]
Bench Mark Assessment Test Critique Essay - For the Test Critique Assignment I choose the Bench Mark Assessment Test for fourth grade. I think it is a great asset to know how my bilingual students are performing against other fourth graders or even to compare them with the national and state scores. The Bench Mark Assessment test is not an option, all students in grades third through eight who take the Illinois Standards Achievement Test (ISAT) must take the Bench Mark assessments test. The Bench Mark Assessment test primary purpose of the Mathematics and Reading Benchmark Assessments test is instructional improvement and not accountability The Bench Mark assessment test was developed to help teachers to measure students’ strengths an...   [tags: Test Critique] 1553 words
(4.4 pages)
Powerful Essays [preview]
Diffusion Lab Essay - Purpose The purpose of this lab was to see firsthand the diffusion of a substance across a selectively permeable membrane. Diffusion is the movement of molecules from an area of high concentration to an area of lower concentration until both concentrations are equal, or as you could more professionally call it, equilibrium. This concept is one that we have been studying in depth currently in Biology class. Procedure We separated into groups of two each, making sure that we had the following materials for the lab: graduated cylinder, plastic sandwich bag, starch solution, twist tie, 500-mL beaker, iodine solution, and a pair of goggles and an apron (for the person handling the iodine solut...   [tags: Science Lab Analysis]
:: 1 Works Cited
670 words
(1.9 pages)
Better Essays [preview]
Essay on Jung Typology Test - Within the Jung Typology Test (JTT) it states that my type of personality is introverted, sensing, feeling and judging. The results indicated I am an introvert over extrovert, the score showed 56%. There was a marginal or no preference to sensing over intuition at 1% for this result. Moderate preference to feeling over thinking at 25%, and a strong preference to judging over perceiving at 78%. So this is saying that I am an introverted sensing with extroverted feeling. The JTT states that I focus internally on myself; I take emotions, feeling, etc....   [tags: personality test, humanmetrics, Myers]
:: 2 Works Cited
1072 words
(3.1 pages)
Strong Essays [preview]
Precipitation Test of Cations and Anions Essay - Qualitative Analysis Purpose: In this lab, we would tests the ions of Mg2+, Ca2+, Sr2+, and Ba2+, and enable each to be identified separately. And by using these observations, we could also identify an unknown. We also would tests the ions of SO42-, CO32-, Cl-, and I-, that also enable each to be identified separately, and to be use to identify the unknown. Safety: Chemicals include toxic. Remember to wash hands after the experiment. Procedure Summary; Part I - Qualitative Analysis of Group 2 Elements We first mix 0.02M K2CrO4 with each Mg(NO3)2, Ca(NO3)2, Sr(NO3)2 and Ba(NO3)2 together....   [tags: Chemistry Lab] 1436 words
(4.1 pages)
Strong Essays [preview]
Essay on Fabrication of an Endothelialized Tube in Collagen Gel - Why should you be interested in the fabrication of an endothelialized tube in collagen gel. If an endothelialized tube can be created in collagen gel this could lead to the creation of a self-developing capillary-like network. This could be very useful because it could make it possible to grow organs in vitro. As of right now three-dimensional organs cannont be grown in vitro because there has been no way create a capillary-like network that will bring oxygen and all the other nutrients to the enitre organ....   [tags: Biology] 998 words
(2.9 pages)
Better Essays [preview]
Essay on beet lab - MATERIAL AND METHODS Stability of cell membrane using pH For the lab experiment for testing the stability of beet cell membranes using pH, many materials were used as follows. Obtaining a beet we punch out cores, using a cork borer. After washing the cores we put each one inside a separate test tube, and added a different pH solution in each one. After 3 minutes in these exposure solutions, we took the beet out with a dissecting needle. Then transferred each beet to a separate test tube containing deionized water....   [tags: essays research papers] 831 words
(2.4 pages)
Strong Essays [preview]
Diffusion Lab Essay - Diffusion Lab Problem Will starch, water, glucose, iodine or a combination of the above diffuse across the membrane of the dialysis bag causing the bag to either expand or shrivel. Hypothesis & Strategy I believe that the smaller molecules, such as glucose and water will diffuse through the dialysis bag’s membrane causing it to expand, due to the concentration gradient. I would test this hypothesis by filling the bag with a solution consisting of water, glucose and starch, tie it off and weigh it....   [tags: essays research papers] 710 words
(2 pages)
Strong Essays [preview]

Related Searches

So my conclusion is that this substance was an extremely weak acid of some sort.

Test-tube F: Test-tube F contained sodium hydroxide. The substance had a very strong reaction to red litmus and no reaction to blue litmus paper. It had a very strong effect on Phenolphthalein, and its pH value tested as 12+, a very strong base. The substance also had a bitter odor. These results led to my conclusion that substance F was sodium hydroxide, one of the strongest bases that exist.

Return to