Phenolphthalein Study guides, Class notes & Summaries

m   1. Which of the following is the mRNA start codon in most cases? A. UAA B. AGU C. AUG D. UGA 2. Which of the types of RNA is the smallest? A. mRNA B. tRNA C. rRNA D. 3. Which of the following is not considered a pyrimidine? A. C B. T C. U D. G 4. Which of the following is paired correctly? A. A-G B. C-G C. A-U D. G-T 5. Which of the following characterizes a Western blot? A. Antibody/protein hybridization B. DNA/RNA combination C. RNA ...

What does COLOR measure? Amount of color units (CU) in a sample. Color caused by natural metallic ions (Fe & Mg) & industrial wastes. What is the test summary for COLOR? Sample -> Tubes -> Compare to color standards over light source Which of the following techniques is used to isolate anionic surfactants (as MBAS) from the sample matrix? Extraction In the cyanide determination, which one of the following is not an interference? Halogenated aromatics Which...

Boiler water is treated in order to prevent a) sludge, mud, pitting, corrosion b) foaming, corrosion, carryover, sludge c) sludge, corrosion, scale, carryover d) scale, sludge, mud, pitting e) foaming, carryover, pitting, corrosion c Dissolved solids in raw water a) cause pitting of boiler surfaces b) cause grooving of piping surfaces c) are organic matter d) cannot be removed with filters e) cause corrosion of boiler surfaces d Boiler surfaces may have what appears to ...

What does COLOR measure? - Answer-Amount of color units (CU) in a sample. Color caused by natural metallic ions (Fe & Mg) & industrial wastes. What is the test summary for COLOR? - Answer-Sample -> Tubes -> Compare to color standards over light source Which of the following techniques is used to isolate anionic surfactants (as MBAS) from the sample matrix? - Answer-Extraction In the cyanide determination, which one of the following is not an interference? - AnswerHalogenated aromatic...

Experiment #: 6 Title: Equilibrium Reactions Purpose: To study equilibrium reactions with two experiments 1. Determine the equilibrium constant Kc and 2. Study LeChatelier’s Principle Procedure: 1. Add 10mL acetic acid and 10mL propyl alcohol in a small flask using a pipette. Mix well 2. Take 1mL pipette sample from flask and place in beaker. Add in about 25mL of water and a few drops of phenolphthalein indicator. 3. Titrate with sodium hydroxide in buret until color change. Record mL ...

Pharm 121 laboratory Answer Sheets 2023/2024 (100%Verified) - Saint Louis University. Activity 1.1. Identify the following apparatuses used in the chemistry laboratory. Write your answers on the space provided before each item. _____________________________ a. It is used to hold solids while they are being weighed or to cover a beaker. _____________________________ b. It is convenient for collecting a precipitate directly within the vessel in which it is to be dried then weighed. _________...

CWEA LABORATORY ANALYST CERTIFICATION EXAMINATION COMBINED TEST QUESTIONS WITH ACCURATE VERIFIED ANSWERS What does COLOR measure? - ANSWER : Amount of color units (CU) in a sample. Color caused by natural metallic ions (Fe & Mg) & industrial wastes. What is the test summary for COLOR? - ANSWER : Sample -> Tubes -> Compare to color standards over light source Which of the following techniques is used to isolate anionic surfactants (as MBAS) from the sample matrix? - ANS...

Practicals Chemistry AQA A-level Rated A+ Required Practical 1 - titration and making a standard solution Making a standard solution 1. weigh the required mass of solid using a sample bottle on a 2 dp balance. 2. transfer the solid into a beaker using distilled water to wash it out- preventing any solid remaining in the sample bottle. 3. reweigh the sample bottle and work out the difference. 4. Add 100cm3 of distilled water to the beaker to dissolve the solid (small volume of water) using a...

Lab Report 14:CHEM 106. Acids and Bases are pHun. Lab Report 14. CHEM 106: Acids and Bases are pHun Introduction: One of the ways we categorize solutions in chemistry is by dividing them into two groups; acids and bases. Acids are substances which donate Hydronium (H3O + ) ions in aqueous solution and have a pH under 7. Bases will produce hydroxide (OH- ) ions in aqueous solution and have a pH over 7. When acids and bases of relatively equal strength react with each other they can prod...

Bronsted-Lowry acid - ANSWER a proton donor. Bronsted-Lowry base - ANSWER proton acceptor What is H3O+? - ANSWER hydronium ion definition of pH - ANSWER -log10[H+] How do you get [H+] from ph? - ANSWER 10^(-pH) the ionic product of water - ANSWER [OH-][H+] Is dissociation an endo or exothermic reaction? - ANSWER endothermic Why is the concentration of water not included in Kw? - ANSWER The concentration of water is so large and constant the equilibrium equation can be simplified How do...

History of the atom correct answersSolid sphere Johnson - Plum pudding (-ve electrons) Rutherford - fired alpha particles at thin gold sheet, a few were deflected backwards - tiny +ve nucleus, surrounded by cloud of -ve electrons Electrons in shells/ energy levels Percentage yield equation correct answersactual yield/theoretical yield x 100 Making new concentrations equation correct answersvol to use = final conc/initial conc x vol required Acid-alkali titrations correct answersUse p...