A teacher adds a small amount of a substance to an erlenmeyer flask while demonstrating titration. and it changes to another color when she adds the acid from the buret above. What is this color-changing substance that is used during titrations?

Q: Br II Br Br II A) III < I < II B) I| <I< II C) III < || < I D) II < III < I E) I< III < ||

A: Given:-   We have to these halides in the increasing order of SN2 reaction.

Q: Calculate the molarity of 81.0 g of HCl in 1.50 L of an HCl solution. Express your answer with the a...

A: Mass of HCl = 81.0 gram Volume of HCl = 1.50 L Molar mass of HCl = 36.5 g/mol  

Q: The Kjeldahl method was used to determine the nitrogen content of a soil sample. 25 g soil sample wa...

A: Solution: We know Kjeldahl method is used to determine the nitrogen content of the any sample. Overa...

Q: Determine the molarity of a solution with a volume of 402. mL and 0.690 mol of solute dissolved.

A: Given :-  no.of moles of solute = 0.690 mol  volume of solution = 402. mL  To calculate :-  molarity...

Q: Reaction product (BH3 + Propene) is

A: The reactants given are BH3 and propene.  

Q: Provide the reagents (up to 3 steps) for the following reaction. (The acetal cannot be formed) HO

A: When ketone react with alcohol in limited amount hemiacetal formed.  

Q: Identify which of following alkyl halides is most likely to undergo rearrangement during a solvolysi...

A:

Q: A 1.280 g sample of oxalic acid, H2C2O4, is placed in a 100.0-mL volumetric flask, which is then fil...

A:

Q: 6. For each numbered step in the qualitative analysis scheme, type the net ionic equation associated...

A:

Q: Which of the following reactions require ethereal solution?               a. CH3CH=CH2 to CH3CH2CH2...

A: Correct option is B

Q: What is the starting material in the following sequence of reactions? tow O K* 1. KMNO4 HO 2. НаО, Н...

A:

Q: Consider the titration of 60.00 mL 0.120 M NaHCO3 with 0.250 M KOH. a. Write the balanced reaction w...

A: Given,  [NaHCO3] of or [HCO3-] = 0.120 M  Volume of NaHCO3 or HCO3- in mL = 60.00 mL  [KOH] = [OH-] ...

Q: The K, of propanoic acid (C,H,COOH) is 1.34 × 10-³. Calculate the pH of the solution and the concent...

A:

Q: here was a hd, new temperature hat woud be graphed in green and would display the effect of a greate...

A: 1.) We would first plot  a curve , which would be plotted for even higher temperature than ' Higher ...

Q: Carbonyl bromide, COBR2 can be produced as shown below. The thermodynamic equilibrium constant, K = ...

A:

Q: Calculate the pH of a solution that is a mixture of 0.030M HNO3, 0.55M CH3COOH, and 0.015M HI. Ka fo...

A: Given data : HNO3 = 0.030 M HI = 0.015 M CH3COOH = 0.55 M

Q: Calculate the pH of an acetic acid/acetate buffer after the addition of 21.60 mL of a .200 M NaOH to...

A:

Q: Which change to an equilibrium modure of this reaction results in the formation of more HS The decom...

A: The equilibrium reaction given is, Given: The reaction is endothermic in nature.  

Q: & How much work is done by or on the system (state which), in kcal, in a reaction if the internal en...

A: Given: Mass of water = 185 g. Initial temperature of water = 20.0 oC Final temperature of water = 65...

Q: Calculate the freezing point of a solution containing 0.745 kg of CHCI3 and 58.0 g of eucalyptol (C1...

A: Mass of eucalyptol = 58.0 g  Mass of CHCl3 = 0.745 kg   

Q: Calculate the pH of a solution prepared by mixing 0.0870 mol of chloroacetic acid plus 0.0250 mol of...

A:

Q: The weak acid, HA, has a Ka of 3.00 x 10-8. What is the Kp of its conjugate base, A"?

A: Given :- Ka for weak acid HA = 3.00 × 10-8  To calculate :- Kb for conjugate base A-   

Q: Which of the following reactions require CH2Cl2 as catalyst?         a. CH3CH=CH2 to CH3CH2CH3    ...

A: Detail description is given below

Q: If the rate law for a reaction is Rate = k[A][B]1/2 , the rate constant k has units of mol-1/2 L1/2s...

A: Given, a) if the rate law for the reaction is Rate = k[A][B]1/2 the rate constant k has unit of mol-...

Q: 2. A solution may contain any of the three group I cations. A white precipitate is formed upon the a...

A: Group I cations, Pb2+, Ag+, and Hg22+ are precipitated as chlorides on the addition of HCl.

Q: 08) An organic compound has the molecular formula C5H12O. The 1H NMR spectrum is shown in the image ...

A: Given molecular formula = C5H12O So,  Degree of unsaturation = C-(H/2)+1 = 5-(12/2)+1 = 0 Hence ther...

Q: An element X has atomic number 34. Which of the following statements about the electron configuratio...

A: Given, Atomic number of element X = 34 For neutral atom of any element, the number of electrons are ...

Q: CH3 HCI CH3 H3C (b) H3C. HBr H3C. CH3 Br (с) HBr or (d) HCI

A: Given 

Q: e number of I of hydrogen gas

A:

Q: Show the mechanism for the following transformation (a variation of the Hofmann rearrangement) e OH

A: -&gt;base can abstract most acidic hydrogen . And in this way there is formation of isocyanate.    

Q: grams of

A:

Q: Automotive antifreeze consists of ethylene glycol, C2H602, a nonvolatile nonelectrolyte. Calculate t...

A: Given, Mass Ethylene glycol =43 gm Volume of water = 85 ml

Q: On

A: Answer is option B

Q: nte 7. D-glucose, blood sugar, exists in two forms; ring open and ring closed. Don’t worry about the...

A: Carbohydrates - Are the polyhydroxy aldehyde  and polyhydroxy ketones.  They have general formula Cn...

Q: A 2.76 g sample of a nonvolatile solute dissolved in 348 g of water depressed the freezing points by...

A: A 2.76 g sample of a nonvolatile solute dissolved in 348 g of water depressed the freezing points by...

Q: 2. A solution may contain any of the three group I cations. A white precipitate is formed the additi...

A:

Q: 23. The integral heats of solution at 18°C for the various solid modifications of calcium chloride i...

A:

Q: If nerves respond to electrical currents, why do you think putting aluminum foi on an amalgam (gray)...

A: 3. Answer - According to the question - Given - If nerve respond to electric current - If we have me...

Q: In the titration of HF with NaOH, which species are present at the equivalence point? HF, NaOH, and ...

A: Titration of HF with NaOH   

Q: 1) For the following solutions circle those that would be considered buffer solutions NH4Cl and NaC...

A: Given, The buffer solutions in  NH4Cl and NaCl :        HCN and NaCN    :  NaH2PO4 and Na2HPO4 :    ...

Q: 06) Responda às questões a seguir para cada uma das substâncias: a) Quantos sinais aparecem no espec...

A:

Q: 4. (a) Calculate the Doppler width (as a fraction of the transition wavelength) for any kind of tran...

A: Given: Temperature = 25 oC = 298 K Molar mass of HCl = 36.45 g/mol Let the transition wavelength be ...

Q: Problem 2: Provide reagents to accomplish the following transformations ( NHAC Me Me OAc Co,Et Me, М...

A:

Q: Calculate the volume in milliliters of KOH needed to prepare 250 mL of a 0.225 M phosphate buffer wi...

A:

Q: If the concentration of oxygen gas found in the air-filled pore spaces of a soil is 200 mg/L at a te...

A: Correct option is C

Q: a- Calculate the radius of the first orbital of a hydrogen atom according to the Bohr model? What is...

A: NOTE: It will be the radius of orbit and not the orbital. Given: Hydrogen atom following Bohr model....

Q: The compound below is the active ingredient in Crestor, a widely-prescribed anti-cholesterol drug. I...

A: Chiral centre of a molecule is defined as the centre or carbon due to which the molecule gives non s...

Q: If you combine 310.0 mL of water at 25.00 °C and 140.0 mL of water at 95.00 °C, what is the final te...

A: Given :-  First volume = 310.0 mL  First Temperature = 25.00°C  Second volume  = 140.0 mL  Second Te...

Q: How much heat is released by the formation of 14.0 g of CaCO,? Show the conversions required to solv...

A: Heat of formation of a compound is defined dis al the amount of heat changed when the compound is fo...

Q: Which of the following compounds has a lower boiling points? Provide the main reason for your choice...

A: The two compounds given are,  

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.