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Caculate the pH pOH of a soulition containing:
0.03 moles of HCl
1.2 moles of NaOH
5.3 x 10-4 moles of HNO3
3.3 x 10-3 moles of KOH
8 x 10-2 grams of HCl
For finding pH or pOH you need some volume of solvent,cause pH=-log[H+], and [H+] is concentration, it is how many mol is in 1L
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15 In chemistry, substances react on the basis of ?
Amount in grams equivalent
Amount in volume equivalent
Amount in relative ratios
Amount in moles equivalent
Amount in moles equivalent The mole is a unit of measurement used in chemistry to express amounts of a chemical substance solution and mole is widely used in chemistry, instead...
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How many moles of HCl could be formed from 5.48 moles of PCl3 and 7.44 moles of water in the following reaction?
PCl3 + 3H2O = 3HCl + H3PO3 water is in shortage, so : n(HCl) = 7.44 mol
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Calculate the concentration of OH- ions when reacting with 100 cm3 of KOH solution, concentration 0.09 mol / dm3 with 120 cm3 of H2SO4 solution with concentration 0.1 mol / dm3!
The reaction given:2KOH + H2SO4 = K2SO4 + 2H2OAs 1 L = 1dm3 and 1 ml = 1 cm3, the number of moles of the reactants equals:n(KOH) = M × V = 0.09...
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How many mL of concentrated HCL solution are needed to provide 90.0g of HCL? Concentrated HCL solution is 37.0% HCl by weight and has a density of 1.19 g/mL.
p =m/V 1,19 = 90/V V = 75,63 ml - it's volume of 37% HCL Need to solve a mass of full solution ( x = V(HCL)+(H2O) ), then 75,63...
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If 7.0 moles of nh3 reacts with 14 moles of o2, how many moles of no2 will be produced?
Calculate how many moles of excess reactant will remain
4NH3 + 7O2 = 4NO2 + 6H2OAccording to the equation NH3 reacts completely, O2 is in the excess.7 mol of NO2 will be produced.According to the equation 7mol*7/4 = 12....
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5.) Calculate the pH of a 2 M solution of H2SO4.
6.) If a 65 mL solution of HCl has a concentration of 0.326 M, what is its pH? Also, how many
grams of HCl are in the solution?
H2SO4 is strong electrolyte, completely dissolves into ions:H2SO4 <=> 2H+ + SO4-Hence: [H+]=4mol/lpH=-lg [H+]=-lg4=-0,6 (negative meaning pH)HCl is strong electrolyte, completely dissolves into ions:HCl <=> H++Cl-Hence: [H+]=0,326mol/lpH=-lg [H+]=-lg0,326=0,49c(HCl)=0,326mol/lHence in 65ml...
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6.) A 11.5 ml solution of HCl has 0.531 g/L of HCl in solution. Calculate the concentration, amount of moles of HCl, and pH of the solution.
1)C(HCl)=0.531/36.5=0.0145 mol/L2)n(HCl)=0.531*0.0115/36.5=1.673 *10^-4 mol3)pH=-lg[H+]=-lg(1.673*10^-4)=3.78
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34.62 mL of a 0.3 M Mg(OH)2 solution are needed to neutralize a 15-mL solution of HCl on unknown concentration. Calculate the concentration of HCl solution.
Mg(OH)2+2HCl=MgCl2+2H2O1.Trace by finding the amount of Mg(OH)2. To do this, we multiply the molarity by the volume (liters): 0.03462litres *0.3 mol/litres= 0.010386 mol Mg(OH)22.based on the reaction we find the amount...
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-Hexane (C6H14) is being used as a fuel. The Moles of Oxygen required for complete combustion of 1 Mole of the fuel is: Select one: a. 9.5 moles b. 10.25 moles c. 10 moles d. None of the above
C6H14+9.5O2=6CO2 +7H2OAnswer a - 9.5 mole
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