how did you get (that's 0.17M x 1/2 = 0.085M)
mols pip = M x L = 0.17 x 0.250 = 0.0425
So it will take 0.0425 mols HNO3 to titrate it. How many mL HNO3 will that be? It will be M = mols/L
0.17 = 0.0425/L and L = 0.250
mols salt = 0.0425. Total volume = 0.500
M salt = 0.0425/0.5 = 0.085M
I've done these about a million times, I guess, and I know that when the SAME concn is used for AND base it is ALWAYS 1/2 of the molarity. It only works that way when the concns are the same, for different concentrations it is some other factor and not 1/2.
Just a minor correction about the 1/2. That is ALWAYS 1/2 of the molarity IF THE CONCN IS THE SAME and IF THE ACID AND BASE HAVE A 1:1 RATIO. That is, for HCl + NaOH (both monoprotic) or
H2SO4 + Ca(OH)2 (both diprotic) etc.
To calculate the result of multiplying 0.17M (0.17 million) by 1/2 (which is the same as dividing it by 2), you can follow these steps:
Step 1: Convert 0.17M to its numerical value.
M represents a million, so we can multiply 0.17 by 1,000,000 to express it as a regular number.
0.17M x 1,000,000 = 170,000
So, 0.17M is equivalent to 170,000.
Step 2: Multiply the numerical value by 1/2.
To calculate 1/2 of a number, you can divide it by 2.
170,000 ÷ 2 = 85,000
Therefore, the result of multiplying 0.17M by 1/2 is 85,000.