Chemistry Help

I have no idea where to begin with this?? This class is moving so fast! Dr. Bob222 I made a 100 on my prelab!! and the online test was so fast I was going through my notes and I was scrambling to figure it out and look up stuff on the periodic table and all!! But I made an 80! I'm happy with that!
Now... What the heck is this?? PH and acids?

Calculate the concentration of OH− and the pH value of an aqueous solution in which [H3O+] is 0.014M at 25°C. Is this solution acidic, basic or neutral?

Write the acid-dissociation reaction of nitrous acid (HNO2) and its acidity constant expression.

Calculate the concentration of the hydronium ion ([H3O+]) for a solution with the pH = 4.51.

Consider the HF solution with the concentration of 5% (w/v). Calculate its concentration in the molarity. Use four significant figures in your answer.

At equilibrium, it was found that [CH3COOH] = 0.8537 M, [CH3COO−]= 0.0040M, and [H3O+] =0.0040 M. Calculate the acidity constant (Ka) and the pKa value of CH3COOH.

  1. 👍 0
  2. 👎 0
  3. 👁 309
  1. You would do well to post separate posts. Sometimes we don't have time to answer 4-5 questions at a time.

    Calculate the concentration of OH− and the pH value of an aqueous solution in which [H3O+] is 0.014M at 25°C. Is this solution acidic, basic or neutral?

    pH = -log(H3O^+)
    pH = -log(0.014M) etc. It's a matter of finding the right buttons on your computer.

    1. 👍 0
    2. 👎 0
  2. (H3O^+)(OH^-) = Kw = 1E-14. You know Kw and H3O^+, solve for OH^-

    1. 👍 0
    2. 👎 0
  3. If H3O^+ > 10-7M, acid
    If H3O^+ = 10^-7M, neutral
    If H3O^+ < 10^-7M, basic

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. economics

    Take a fast moving consumer good(FMCG) like washing machine detergent . Analyse the factors that determine the demand of this product .present your findings in form of a class work

    asked by tuba on June 1, 2019
  2. Science

    Which choice describes how energy is transferred at the particle level through the process of conduction? A. The fast-moving particles in the colder material collide with the slow-moving particles in the hotter object. The

    asked by Science on May 6, 2019
  3. Maths

    A ball is thrown vertically upwards at 3 m s-1 from 1m above ground level (I) write down the equation for the height of the ball above the ground after t seconds (while the ball is in the air). (II) use your answer to find the

    asked by Ed on November 17, 2016
  4. physics

    The actual speed of electrons drifting along in a common electric circuit is about the speed of which of the following?. A) sound.B) a fast-moving automobile.C) light.D) a slow-moving snail.

    asked by britches on April 14, 2012
  5. Science

    Which phrase best describes a car that has positive acceleration. A. The car is moving slowly. B. The care is slowing down. C. The car is speeding up. D. The car is moving fast. I think its it`s C. But i need help. Please

    asked by SinistarStewie on September 15, 2016
  1. Science

    Starting from rest, a boulder rolls down a hill with constant acceleration and travels 3.00 during the first second. How far does it travel during the second second? How fast is it moving at the end of the first second? How fast

    asked by Morgan on September 19, 2006
  2. Physics - Doppler Effect

    How fast is a car moving and in what direction if the frequency of the horn drops from 900 Hz to 875 Hz, as heard by a stationary listener? The air temperature is 0oC. How to solve? I have no idea...

    asked by lost in life on June 2, 2016
  3. L PreCal

    A car is moving at a rate of 65 miles per housr and the diameter of it's wheels is 2.5ft. Find the number of revolutions per minute the wheels are rotating. I have no idea where to begin on this question. How do you find rev per

    asked by Norah on August 29, 2010
  4. Math

    A car moving at 4.5 m/s accelerates at 2.5 m/s square. How fast will it be moving after 7.5 seconds ?

    asked by Aayushman on April 22, 2013
  5. Physics

    a 57.0 kg person on a rollercoaster moving through the bottom of a curved track of radius 42.7 m feels a normal force of 995 N how fast is the car moving

    asked by Aaron on June 13, 2019
  6. Physics

    Two identical objects, one moving twice as fast as the other, collide with each other in the following way: 0--------> 2v v

    asked by Bob on May 15, 2012

You can view more similar questions or ask a new question.