The pH of a solution of HBr is found to be 3. How many grams of HBr are in a 100 mL sample?
use:
pH = -log [H+]
3 = -log [H+]
[H+] = 1*10^-3 M
volume , V = 1*10^2 mL
= 0.1 L
use:
number of mol,
n = Molarity * Volume
= 1*10^-3*0.1
= 1*10^-4 mol
Molar mass of HBr,
MM = 1*MM(H) + 1*MM(Br)
= 1*1.008 + 1*79.9
= 80.908 g/mol
use:
mass of HBr,
m = number of mol * molar mass
= 1*10^-4 mol * 80.91 g/mol
= 8.091*10^-3 g
Answer: 8.09*10^-3 g
The pH of a solution of HBr is found to be 3. How many grams of HBr are in a 100 mL sample?
how many milliliters of 20% HBr solution contain 4 grams of HBr? 2. How many milliliters of 20% (m/v) HBr solution contain 4 grams of HBr?
1. If there are 15 g in 35 mL of a solution, how many grams are there in 100 mL of this solution? 2. If there are 3 g in 75 mL of solution, how many grams are there in 200 mL of the same solution? 3. If there are 5 g in 200 mL of solution, how many milliliters of the same solution can be made form 30 grams? 4. If there are 8 grams in 160 mL of...
A) A solution of HClO4 has a pH of 2.41. How many grams of HClO4 are there in 254 mL of this solution? B) How many grams of HClO4 are in 254 mL of. HClO4 solution that has twice the pH?
How many grams of acetic acid are in a sample solution if 22.50 mL of a 0.125 M sodium hydroxide solution are required to neutralize it?
How many grams of sodium acetate must be added to 100 ml of a 0.122 M solution of acetic acid so that the solution will be buffered at pH= 5.40?
How many mL of the titrant HBr is needed to titrate 8.41 mL of 0.044 M NH2CI, if the molarity of the titrant is 0.088? What is the pH of a solution that contains 0.50 M H3PO4 and 0.89 M NaH2PO4? The Ka of H3PO4 is 7.5x10-3. How many mL of the titrant HBr is needed to titrate 8.41 mL of 0.044 M NHCl, if the molarity of the titrant is 0.088? What is the pH of when 0.066 L...
How many grams of glucose would you need to make 100 ml of a 15% solution? And how many milliliters of what would you use?
a solution of nitrous acid (HNO2 , Ka=4.5*10^-4) has a pH OF 1.85. How many grams of nitrous acid are there in 100 ml of the solution?
How many mL of 3 M NaOH solution should be added to 100 mL of 0.200 M acetic acid to make acetate buffer, pH 5.00
43. An aqueous solution of methylamine (CH3NH2) has a pH of 10.65. How many grams of methylamine are there in 100.0 mL of the solution? Calculate the pH and percent ionization of a 0.990 M HNO2 solution. pH = %