quest A buffer solution is 0.354 M in HCN and 0.247 M in NaCN. If Ka for HCN is 4.0x10-10, what is the pH of this buffer solution?

Q: The geometry around the double bonded C atom in this structure is? (CH3)2C=0 O A. tetrahedral OB.…

A: Given compound: (CH3)2C=O We have to find the geometry around the double-bonded C atom in this…

Q: When 14g MgSO4 7H2O is dissolved in 100g water the density of the solution is found to be 1.060g/mL.…

A: Molarity:  Molarity is one of the unit of concentration. It is defined as the number of moles of…

Q: E, V -0.745 -0.75 -0.755 -0.76 -0.765 -0.77 -0.775 Ill only II and III I and III I only Il only 0 I…

A: Answer: Graph between Ecell and lnQ is given to us and we have to identify important information…

Q: An analytical chemist is titrating 136.3 mL of a 0.1300M solution of ammonia (NH3) with a 0.1800M…

A: Here we required to find the pH of the solution.

Q: What is the concentration in %w/v of a 0.425 M aqueous solution of methanol (MM = 32.04 g/mol)? A)…

A: Given, Molar Mass of Methanol = 32.04 g/mol Molarity of methanol = 0.425 M

Q: For each of the following compounds determine which (if any) lone pairs are participating in…

A: If lone pair is in conjugation with vacant p-orbital or double bond then they become delocalised.

Q: Determine the starting materials to form the following Diels-Alder products: 4 OCH₂ CH₂ COOH CH₂ Z…

A:

Q: If 23.9 g of CH₃OH (MM = 32.04 g/mol) are added to a 500.0 mL volumetric flask, and water is added…

A: Molarity (M) is a concentration term for a solution. The molarity of the given solution is defined…

Q: 07/ Oxygen at 30 °C and 300 kPa absolute pressure ex- pands isothermally to an absolute pressure of…

A:

Q: What is the concentration of a solution made with 0.200 moles of KOH in 400.0 mL of solution?

A: Concentration of a solution is the no of moles of solute dissolved in a given amount of solvent. It…

Q: Given are the standard reduction potentials for the following half- reactions: Mn² (aq)+2e → Mn(s)…

A: In an electrochemical cell, the anode is the electrode that releases electrons to the external…

Q: How many moles of CH₃OH are there in 67.1 mL of 0.400 M CH₃OH?

A:

Q: the KIA, the black precipitate indicates the presence of  A.) lactose B.) Glucose C.) Ferrous…

A: In the KIA, the black precipitate indicates the presence of Hydrogen sulfide. The correct option is…

Q: Some vapor pressure data for ethanol/water solutions at 298 K are given in the table below. Plot…

A: To calculate Henry's Law constant for: (a) ethanol in water  (b) water in ethanol

Q: What is the specific heat of silver?

A: Specific heat ---- The heat requires to raise the temperature of one gram of substance by one degree…

Q: Complete the following solubility constant expression for CaCO3. K = sp X 00

A:

Q: 0) Which equation best represents the net ionic quation for the reaction that occurs when aqueous…

A: Given reactants- Cesium phosphate and magnesium nitrate

Q: The major product/s that form/s during the nitration of benzenesulfonic acid is? choose the correct…

A: we have to predict the major product of nitration of benzene sulfonic acid

Q: QUESTION 16 What is the pH of a 0.20 M solution of the weak base ephedrine (Kb = 1.4 x 10-4) at 25…

A: 16.) A weak base will react with water to give hydroxide ions. So first we would write equation and…

Q: QUESTION 19 A sample of hydrochloric acid (approximately 0.10 M) is titrated with 0.0993 M NaOH at…

A: The given reaction is a reaction between a strong acid (hydrochloric acid) and a strong base (NaOH).…

Q: What is the chemical formula for aluminum carbonate heptahydrate? What is the molar mass of…

A:

Q: What is the property of an atom that determines whether its interaction with another atom ranges…

A: Covalent bond: The chemical bond is formed by equal sharing of electrons between the two atoms is…

Q: PARLO Draw the major products obtained from heating each of the following others with one equivalent…

A: Ethers reacts with HI to give alcohols and alkyl iodides.  When primary and secondary alkyl groups…

Q: == Q5.50 Homework Unanswered What is the enthalpy of formation (AH°f, in kJmol-¹) of Pb(NO3)2(s)? ✪…

A: According to the question we have, The lead(II) nitrate and we have to find the enthalpy of…

Q: Gaseous ethane (CH3CH3) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO2)…

A:

Q: What type of oxygen-based functional groups may be present in the molecule, based on the IR? Can the…

A: Given that the molecular formula of an unknown compound is C6H12O. The degree of unsaturation of…

Q: The yellow-brown haze associated with smog comes from the NO molecule called

A: The yellow-brown haze associated with smog comes from the NO molecule is called as photochemical…

Q: Ob Which bond (a or b) is longer? NO₂ a O a O₂N O neither -I NO₂

A: Here we are required to find which bond is longer

Q: ▼ Part C ▾ Calculate the Ki, value for CH₂CH(OH)COO Express your answer numerically to two…

A: The relation between Ka and Kb values are- Ka×Kb=Kw= 1.0×10-14

Q: (v) (vi) Ph 10-t CO₂H CH,Ph Ac₂O, TSOH (i) LDA then Mel (ii) P(OME)3, heat PhS á OH CH,Ph

A:

Q: Consider the reaction NH3(aq) + H₂O(2) = NH4+ (aq) + OH(aq). Kb for NH3 is 1.8 x 10-5 at 25°C. What…

A:

Q: QUESTION 21 Which of the following is the correct definition for an Arrhenius base? O a. proton…

A: we have to select the correct definition of Arrhenius base

Q: Why is dimethylamine more basic than aniline? (Provide structures)

A: Delocalisation of lone pair decreases basicity

Q: The pH of a basic solution is 10.65. What is [OH⁻]?

A: Given the pH of the basic solution, pH = 10.65  We can find the pOH of the solution using the…

Q: The molar mass of a certain object is 0.032 kg/mol. At 380 K, the molecular root-mean-square speed…

A:

Q: Given the reactions, X(s) + O₂(g) →→→ XO(s) XCO3(s) → XO(s) + CO₂(g) what is AH for this reaction?…

A: Thermodynamics is branch of chemistry in which we deal with amount of heat evolved or absorbed by…

Q: What is the oxidation number of Fe in Fe(NO3)3? If the oxidation number is positive, just write the…

A: Oxidation number of the atom can be identified by considering the oxidation states of other anions.

Q: An analytical chemist is titrating 196.9 mL of a 0.1800M solution of piperidine (C-H₁0NH) with a…

A: Volume of piperidine = 196.9 mL Concentration of piperidine = 0.1800 M Volume of HNO3 = 209.3 mL…

Q: A HCN / NaCN buffer system is to be constructed that is also 0.048 M in Mg2+ What is the minimum…

A: Given :

Q: In your analytical lab, you wish to determine the solubility of Fe³* for the following reaction that…

A: Given: Fe(OH)3 in 0.10 M KNO3 Activity coefficient for Fe3+ , γFe3+= 0.180 Activity coefficient for…

Q: What is the order in which the H1 NMR singals would appear (from most downfield to most upfield) ?…

A: 1Hnmr spectra provides the information of hydrogen environments of the unknown compound. The factors…

Q: Predict the major product obtained when the following compound (A) is treated with Birch reduction…

A:

Q: What are amphoteric oxides chemical reaction. Explain with examples of amphoteric oxides

A: Definition and example of amphoteric oxides is given below :

Q: Complete the second row of the table. Express your answer using two significant figures. [H+]=…

A:

Q: 14. For the reaction below, predict the MAJOR product that would form via a different mec product…

A:

Q: te strong acid.

A: Step1 :- Given in following question a statement A concentrated weak acid cannot have a lower PH…

Q: Determine precipitation sequence (qualitative). A solution contains 0.20 M potassium sulfate and…

A: Solid lead nitrate was added slowly to a mixture of solution containing 0.20 M potassium nitrate…

Q: Identify the predominant intermolecular force in each of these substances. Hydrogen bonding H₂O OH…

A: Dispersion forces are predominantly the only forces in non-polar compounds. All hydrocarbon are…

Q: Xylometazoline hydrochloride paediatric nasal drops are formulated as a 0.05% w/v solution. What…

A:

Q: The hydronium ion concentration of a solution is 8.4 x 10-6 M. What is the pH of the solution? O a.…

A: To solve this problem we will use the formula of pH calculation .

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.