Magnesium oxide (MgO) has a NaCl type crystal structure. The ionic radii of Mg2+ and O2- ions are 0.86 Å and 1.26 Å, respectively. The molar mass of Mg and O are 24.305 g mol-1 and 15.999 g mol-1, respectively.  a. Calculate the no. of Mg2+ and O2- ions in the unit cell.  b. Calculate the density.

Q: If you dilute a buffer solution, what would you expect to happen to the pH?   Increase   Decrease

A: pH is defined as negative logarithm of hydrogen ions present in solution.

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Q: Consider the following reaction scheme (note that the reagent shown above the arrow is DBN"). Draw…

A: DBN is a sterically hindered bicyclic non-nucleophilic nitrogen base.

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Q: Assuming 0.1 M concentrations, arrange the following acid solutions in order of increasing pH.…

A: Concentration of each given acid = 0.1 M (c) We know that -> [H+] = √(Ka ×c)

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A: The given statement is true. As It can be oxidized by losing two protons and two electron to form…

Q: Consider the 4HCI(g) + 02(g) 2H20(g) + 2C12(g) Using the standard thermodynamic data in the tables…

A: Given-> 4HCl(g) + O2(g) ---> 2H2O(g) + 2Cl2(g) Pressure of each gas = 14.30 mmHg

Q: Task 2: Electrolysis of Lead Bromide (PbBr,) White, solid lead (I) bromide is heated until it…

A: PbBr2(l) ----> Pb2+(l) + 2Br-(l) So the ions present in the molten solution are Pb2+(l) and…

Q: 8. A buffer consists of a mixture of a weak acid and its conjugate base but the pH 4.00 buffer…

A: above molecule contain both acid as well as salt . so it can act as buffer. if we add hCl to the…

Q: 4. For each of the following metal complexes determine the formal oxidation state, d" electron…

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A: Salt of Strong base and weak acid is acidic and strong base and weak acidic is basic

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A:

Q: Prelaboratory Assignment: Electrochemistry: Galvanic Cells and the Nernst Equation 1. Use the…

A: E°call = E°cathode - E°anode ∆G° = -nFE°cell Hence, if E°cell positive then ∆G° is negative…

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Q: Prelaboratory Assignment: Electrochemistry: Galvanic Cells and the Nernst Equation 1. Use the…

A: If the value of Eo is positive then the reaction is spontaneous under standard condition.

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Q: 6. Suggest the product (THF is a solvent, tetrahydrofuran): OMe NaH THE -P(O)(OEt)2 t-BuO2C

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Q: using a standard 0.100 M sodium hydroxide solution to titrate 50.0 mL of a 0.100 M hydrochloric acid…

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Q: Molecular equation: HC2H302 (aq) + NH3 (aq) → NH4C2H3O2 (aq) Complete ionic equation: 4 Net ionic…

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Q: 3. Calculate E° for the following cells: a) Cl/CIO;//02/H2O b) OH/O2//CIO3/CI (basic medium)

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Q: 2. Calculate E°, AG° and K at 25°C for the reaction: 4CIO (ag) - Cl (ag) +3CIO, (ag)

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Q: A voltaic cell uses the following reaction T (aq) + 2Cr TI(aq) + 2Cr (aq) has a measured standard…

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A: Grignard reagent react with CO2 and H+ and formed Acid.

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A: Solution -

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Q: 20. Propose an efficient synthesis for the following transformation: OH ÓH

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A: Viscosity of methane at 20°C is 1.09x10-4 .

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Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.