1 Answers
Call
Talk Doctor Online in Bissoy App
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
1 Answers 1 views
Determine of pH of acid solutions like 0.1m hcl,0.5m hcl,0.025m hcl,0.0125m hcl by using quinhydrone and calomel electrode .compare the values of pH with theoretically calculated values.
pH = -lg [H + ]; 0.1m hcl: pH = 1; 0.5m hcl: pH = 0.3; 0.025m hcl: pH = 1.6; 0.0125m hcl: pH = 1.9.
1 Answers 1 views
1. Considering the following reaction: 3Si + 2n2 →Si3N4 2. When 26.8 moles of Si react with 21.845 moles of N2, how many moles of Si3N4 are formed? 3. What is the limiting reactant?
Mole ratio of Si:Si3N4= 3:1= 26.8/3= 8.933Mole ratio N2: Si3N4=2:1= 21.845/2= 10.923= 10.923+8.933= 19.856moles
1 Answers 1 views
Balanced equations for the following does reaction occur thank you
Fe + HCl
Cu + HCl
Zn + HCl
Fe + HNO3
Cu + HNO3
Zn + HNO3
Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g) – reaction occurs Cu(s) + 2HCl(g) → CuCl2(s) + H2(g) – reaction occurs at 600 Celcius Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)...
1 Answers 1 views
What would it look like and does a reaction occur:
Fe and HCl
Zn and HCl
Cu and HCl
Fe and HNO3
Cu and HNO3
Zn and HNO3
Iron and zinc force out hydrogen from hydrochloric acid: Fe + 2HCl → FeCl2 + H2↑ Zn + 2HCl → ZnCl2 + H2↑ Copper is among tension after hydrogen therefore...
1 Answers 1 views
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...
1 Answers 1 views
How many grams of hcl, hcl are required to prepare 4 L of 5M HCL in water?
At first we will count the amount of HCl:n = c * V = 5 M * 4 L = 20 mol;Now we can find out the required mass of...
1 Answers 1 views
1. Water can be formed from the synthesis reaction of hydrogen with oxygen:
2 H2 + O2 → 2 H2O
If the reaction begins with 5.12 moles of oxygen, O2, how many moles of water are produced?
n(O2):n(H2O)=1:2n(H2O)=5.12*2=10.24molAnswer: 10.24mol
1 Answers 1 views
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
1 Answers 1 views
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
0.0115 x 0.531/36.5 = 1.67e-4 moles.1.67e-4/0.0115=0.0145 M.pH: 1.83863199777
1 Answers 1 views