Naoh - Study guides, Class notes & Summaries

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...

Honors Chemistry Exam Questions with Correct Solutions Why can salt and sugar both dissolve in water, even though one is ionic and the other is covalent? A. Water is always cooler than the salt and sugar, allowing them to dissolve easily. B. Salt's ions and sugar's polar bonds are both attracted to the polar water molecules. C. Everything can dissolve in water because water is considered a universal solvent. D. There is enough space between the large water molecules to easi...

CHEM 101 Lab Exam Questions and Answers All Correct When titrating vitamin C with KIO3 (Iodate), the following steps occur (once KI and HCl are added) - Answer-1) The iodate anion reacts with I- and H+ to form I2 2) Once formed, I2 is reduced immediately by vitamin C back to I-. As each I2 reacts with one C6H8O6, each IO3- that is added results in the reaction of 3 C6H8O6 molecules 3) After all of the vitamin C in the sample has been consumed, the I2 from the addition of more iodate reacts r...

Cotton plugs or screw caps are used in test tubes containing sterile media or pure cultures to... - -prevent unfiltered air or dust particles from entering the tubes -maintain anaerobic conditions -and prevent culture from spilling *all of the above* If the pH of the medium is higher than 7.0, you can adjust to 7.0 by: - adding drops of HCL to *lower* it or NaOH to *raise* it The pH indicator in Simmons Citrate agar is what? - Bromothymol blue bacteria that show no preference, grow equal...

Exam 3 - Chem 1520 Questions And Answers acid-base indicator - ANS-a weak organic acid whose color differs from that of its conjugate base pH - ANS-the color of an indicator changes over a specific, narrow ____ range, a range of about 2 units neutralizing - ANS-in an acid-base titration, the concentration of an acid (or a base) is determined by _________________ the acid (or base) with a solution of a base (or acid) of a known concentration equivalence - ANS-The ______________ point of the...

CHEM MISC Activity B.3 Relationships in Acid-Base Reactions Lab Report Answered 2024. Activity B.3 Relationships in Acid-Base Reactions Lab Report Collective Analysis A variable is a property of an object that can take on different values. The relationships between four variables were explored in experiments A (Part I) and B (Part II). The variables were VHCl (volume of hydrochloric acid), NNaOH (total number of drops of sodium hydroxide) and VH2 O (volume of water), and T (temperatur...

CHEM 210 Exam 1 Review Questions and Correct Answers, With Complete Solution 2024. What is a BL acid? BL base? Acid is a proton donor while a base is proton acceptor List the 6 strong acids HClO4, HCl, HBr, HI, HNO3, H2SO4 List the 6 strong bases LiOH, NaOH, KOH, Ca(OH)2, Sr(OH)2, Ba(OH)2 What is the eq. for the dissociation of a weak acid? HA <=> H+ + A- Ka = ([H+][A-])/[HA] What is the eq. for base hydrolysis? B + H2O <=> BH+ + OH- Kb = ([BH+][OH-])/[B] What is t...

NAME each of the following reaction types: HCl + NaOH -> NaCl + H20 Glucose + galactose -> lactose + H20 H+ + HCO3- <-> H2CO3 Amylose + H20 -> many glucoses - ANSWER HCl + NaOH -> NaCl + H20 (EXCHANGE REACTION) -Acid-base reactions Glucose + galactose -> lactose + H20 (ANABOLIC REACTION) -Dehydration synthesis reaction

CHEM-C125 ASSESSMENT TEST QUESTIONS WITH CORRECT ANSWERS A solid sample contains both NaOH and NaCl. 0.500 g of this solid sample was dissolved in water to make a 20.0 mL solution and then this solution was titrated by 0.500 mol/L HCl solution. If 22.5 mL of HCl was used to reach the end point, what is the mass % of NaOH in the original solid sample? NaOH + HCl --> NaCl + H2O - Answer- 90 During titration, it is very common to have some NaOH spilled to the inside wall of Erlenmeyer fl...

This question is about atomic structure.There is a general trend for an increase in ionisation energy across Period 3. Give one example of an element that deviates from this trend. Explain why this deviation occurs. : Aluminium / Al(Outer) electron in (3)p orbital / sub-shell (level) (3p) higher in energy / slightly more shielded (than 3s) / slightly further away (than 3s) Give an equation, including state symbols, to represent the process that occurs when the third ionisation energy of...