Inorganic Chemistry Answers

Dear Sir/Madam

can you please answer this question for me.

thanks in advance

​1-Chloropropane was hydrolysed by an aqueous potassium hydroxide solution. 

   C3H7Cl   +  KOH   →    C3H7OH    +   KCl  

​​   1-Chloropropane​           Propan-1-ol

​During the reaction, the reactant potassium hydroxide is used up. Samples of the reaction mixture were drawn off at regular time intervals and analysed by titration with standard hydrochloric acid to find out the concentration of KOH. 

    The results are given in the table below:

Time / s

Concentration of OH-  / mol dm-3

0.500

100

0.350

200

0.250

300

0.180

400

0.125

500

0.090

600

0.063

       700

0.040

800

0.030

​​​​​

(a)

From the above information, Plot a Concentration of OH- (mol dm-3) against Time (s) graph. The graph MUST be a hand drawn (plotted) graph. 

(b)

Select 4 suitable points along your graph [see part (a)] and draw tangents to find the rates. Construct a table of “Rate” against “Concentration”. Note: The rates need to be calculated and the calculations shown.

(c)

Plot a graph of Rate against Concentration of OH-. The graph MUST be a hand drawn (plotted) graph.

(d)

From your graph in part (c) deduce the Order of Reactionwith respect to OH- (hydroxide ions).

(

(e)

Write a rate equation with respect to concentration of hydroxide ions.

(f)

Calculate the rate constant k from the gradient of the graph, drawn in part (c). Show and explain your working.

Reaction between lead(ii) nitrate and sodium iodide to produce lead(ii) iodide and sodium nitrate

Procedure:Use electron dot structures to predict the formulas of the ionic compounds formed from the following elements:

  1) 200.0 g of Ca(C2H3O2)2 was found in the chemistry laboratory.  

    Calculate 

a) . the volume at STP if Ca(C2H3O2)2 is converted to gas.     

b) .  the molarity of a solution made by dissolving 200.0 g of Ca(C2H3O2)2 in 200 mls of water

A) A 1.00 g gaseous sample of hydrocarbon occupies a volume of 385 mL at 330 K and 1.00 atm. Find the molar mass of the compound.

B) Calculate the number of atoms of He(g) that are needed to exert a pressure of 4.0 X 10–2 kPa in a 15 mL container at a temperature of –23°C.

95.0 grams of I₂O₅, reacts with 45.0 grams of carbon monoxide, CO, in the reaction described below. If the percentage yield is 93.0% calculate the actual yield of CO₂ in grams.

a) 200.0 g of Ca(C₂H₃O₂)₂ was found in the chemistry laboratory. 

      Calculate

          i. the molecular mass of 1 mole Ca(C₂H₃O₂) _2.

         ii.  the number of  moles of Ca(C₂H₃O₂)₂  that exists   

        iii.  the number of Ca(C₂H₃O₂)₂ molecules present

a) Calculate the pressure exerted by 0.0153 moles of CO₂ gas in a container of 1.467 L at 20.0°C.

b) What is the volume of a 15.0 g sample of propane (C₃H₈) gas at Standard Temperature Pressure?

c) Assuming that the volume of the container in question part (b) above remains constant, what would be the pressure of the propane at room temperature (25 °C)? 

1. If the pressure of 180cm3 of a sample of air is halved at constant temperature, what will be its new volume?

Write the chemical equation for hydrolysis of phen-cys-val tripeptide. Name the obtained products?