Top topic this week
Back to FAQs
Related FAQs
Frequently Asked Question
Questions asked by users might not always be phrased in the clearest way.
What is the ph of 0.0020m of HCL? Teach me calculations of OH- and OH+
Accepted Answer
The pH of a 0.0020 M HCl solution is 2.70. Here's how to calculate it:
1. Understanding pH
pH is a measure of the acidity or basicity of a solution. It is calculated using the formula: pH = -log[H+] where [H+] is the molar concentration of hydrogen ions (H+).
A pH of 7 is neutral, values below 7 are acidic, and values above 7 are basic.
2. HCl is a Strong Acid
HCl (hydrochloric acid) is a strong acid, meaning it completely ionizes in water. This means that 0.0020 M HCl produces 0.0020 M H+ ions.
3. Calculating the pH
pH = -log[H+] = -log(0.0020) = 2.70
Regarding OH- and H+:
OH- (Hydroxide ions) are associated with bases. They are the opposite of H+ ions.
H+ (Hydrogen ions) are associated with acids.
Water Dissociation: In pure water, there is a balance between H+ and OH- ions. This is described by the ion product of water (Kw): Kw = [H+][OH-] = 1.0 x 10^-14 at 25°C.
To calculate [OH-]: You can use the Kw equation and the [H+] you already calculated. For example, in this case: [OH-] = Kw / [H+] = (1.0 x 10^-14) / (0.0020) = 5.0 x 10^-12 M
Let me know if you have any further questions about pH or acid-base chemistry!
Articles you might like