1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
OLga [1]
3 years ago
10

A student has a 0.00124 M HCl (aq) solution and she titrates 25.00 mL of this solution against an unknown potassium hydroxide so

lution. The acid requires 44.25 mL of base to reach the end point, what is the molarity of the KOH (aq) solution?
Chemistry
1 answer:
malfutka [58]3 years ago
5 0

Answer:

The Molarity of KOH is

7,01.10^{-4}M

Explanation:

The endpoint indicates the volume necessary to neutralize the moles of acid.

In other words, the point at which the moles of both solutions are the same.

M_{(HCl)}V_{HCl}=n\\ \\M_{(KOH)}V_{KOH}=n

we match these equations and find the concentration of KOH

M_{(HCl)}. V_{(HCl)} =M_{(KOH)} .V_{(KOH)}\\ \\M_{(KOH)}=\frac{M_{(HCl)}. V_{(HCl)}}{V_{(KOH)}} \\\\M_{(KOH) =\frac{(25mL)(0,00124m)}{(44,25mL)}\\\\

M_{(KOH)}=7,01.10^{-4}

You might be interested in
Why do they call Cleveland "the mistake by the lake"?
algol13
Mostly because the lake smell really bad and the waters really dirty

3 0
3 years ago
If 0.400 moles CO and 0.400 moles O2 completely react how many grams of CO2 are produces?
True [87]

If 0.400 moles CO and 0.400 moles O2 completely react, 17.604 grams of CO2 would be produced.

First, let us look at the balanced equation of reaction:

2CO + O_2 ---> 2CO_2

According to the equation, the mole ratio of CO and O2 is 2:1. But in reality, the mole ratio supplied is 1:1. Thus, CO is the limiting reactant while O2 is in excess.

Also from the equation, the ratio of CO consumed to that of CO2 produced is 1:1. Thus, 0.400 moles of CO2 would also be produced from 0.400 moles of CO.

Recall that: mole = mass/molar mass

Therefore, the mass in grams of CO2 that would be produced from 0.400 moles can be calculated as:

    Mass = mole x molar mass

                 = 0.400 x 44.01

                       = 17.604 grams

More on calculating mass from number of moles can be found here: brainly.com/question/12513822

7 0
2 years ago
A fish tank holds 45 gal of water. How many kilograms of water are in the fish tank?
larisa [96]

Answer:

How to convert 45 gal to kg? You can use the following formula to convert from Gallon to Kilograms :

X(kg) = y(gal) / 0.264172053

To convert 45 Gallon to Kilograms:

X(oz) = 45(gal) / 0.264172053

Answer: 170.3435 kg

7 0
2 years ago
I need help with this
Lelechka [254]

Answer:

The answer is its equal to the volume of its container.

--------------------------------------------------------------------------------

I hope this helps! :)

7 0
3 years ago
Write the three factors that affect surface ocean currents
yan [13]
<span>global wind patterns, rotation of the earth, shape of ocean basins.</span>
8 0
3 years ago
Other questions:
  • The change in an object's volume that occurs when heat is added is called
    5·2 answers
  • Which best describes the role of a secondary consumer in a food web?
    7·2 answers
  • What element is represented by the electron configuration [ar]4s23d8?
    14·1 answer
  • Which state of matter is described as an electrically charged gas?
    13·2 answers
  • What is the volume of 67.1g of ethyl alcohol, which has a density of 0.79 g/mL?
    10·1 answer
  • 29 Which compounds are classified as Arrhenius acids?(1) HCl and NaOH
    12·1 answer
  • More Changes of state: Activate 1 p68-69 What is evaporation and how is it different to boiling
    5·1 answer
  • How many silver atoms are there in 3.76g of silver?​
    10·1 answer
  • What change occurs to an atom when it forms negative ion​
    9·2 answers
  • How many grams sodium bromide can be formed from 51 grams of sodium hydroxide?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!