MYTUTOR SUBJECT ANSWERS

1007 views

A student titrates 25.00 cm3 of hydrochloric acid with 28.60 cm3 sodium hydroxide solution of concentration 0.200 moles per dm3. The equation for the reaction is: HCl + NaOH to NaCl + H2O. Calculate the concentration of the hydrochloric acid.

From the equation given in the question we can see that one mole of hydrochloric acid (HCl) reacts with one mole of sodium hydroxide (NaOH). 

The first thing to do is to work out the number of moles of sodium hydroxide that reacted by using the equation n = cv (number of moles = concentration x volume). 

To do this we need to convert the volume 28.60 cm3 into dm(which is the same as litres). There are 1000 cm3 in a dmso 

28.60 cm= 28.60 / 1000 dm= 0.0286 dm3

Now we can use n = cv = 0.200 moles per dm3 x 0.0286 dm= 0.00572 moles of sodium hydroxide

Since one mole of hydrochloric acid reacts with one mole of sodium hydroxide, 0.00572 moles of hydrochloric acid reacted.

We can now use the equation n=cv and rearrange it to c = n/v to find the concentration of hydrochloric acid. 

The volume of hydrochloric acid again needs converting to dm3:

25.00 cm3 = 25.00/1000 dm3 = 0.025 dm3

c = n/v = 0.00572 moles / 0.025 dm3 = 0.23 moles per dm3

Hannah A. GCSE Chemistry tutor, GCSE Maths tutor

1 year ago

Answered by Hannah, who has applied to tutor GCSE Chemistry with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

226 SUBJECT SPECIALISTS

£18 /hr

Nikhita G.

Degree: Pharmacy (Bachelors) - Nottingham University

Subjects offered: Chemistry, Science+ 3 more

Chemistry
Science
Maths
English
Biology

“I am currently studying Pharmacy at the University of Nottingham. I hope my enthusiasm for the sciences and maths is reflected in my teaching of the subjects. I have been teaching students since the age of 14 and have developed a grea...”

£18 /hr

Marcus B.

Degree: Medicine (Bachelors) - Newcastle University

Subjects offered: Chemistry, Physics+ 1 more

Chemistry
Physics
Biology

“I'm a medical student at Newcastle University. I love medicine as I have a passion for human biology and interacting with lots of people on a daily basis.”

MyTutor guarantee

£18 /hr

Simon C.

Degree: Mathematics (Bachelors) - Bath University

Subjects offered: Chemistry, Maths+ 1 more

Chemistry
Maths
Further Mathematics

“I'm currently studying maths at Bath University and I've always found understanding maths a natural gift and explaining how it works is something I enjoy as it helps cement my own knowledge. Similarly I have a very logical mind and I ...”

MyTutor guarantee

About the author

£18 /hr

Hannah A.

Degree: Chemistry (Bachelors) - Durham University

Subjects offered: Chemistry, Maths

Chemistry
Maths

“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

MyTutor guarantee

You may also like...

Posts by Hannah

A student titrates 25.00 cm3 of hydrochloric acid with 28.60 cm3 sodium hydroxide solution of concentration 0.200 moles per dm3. The equation for the reaction is: HCl + NaOH to NaCl + H2O. Calculate the concentration of the hydrochloric acid.

You are given a square which you are told has a total area of 100 squared centimetres. You are also told that one side of the square has dimension 4(3x + 2), and the other has dimension 8x - y. What are the values of x and y?

Other GCSE Chemistry questions

Why can graphite conduct electricity but diamond can not?

Calculate the atom economy for making hydrogen when zinc is reacted with HCL?

Explain why chlorine (Cl2) is a gas at room temperature, but sodium chloride (NaCl) is a solid at room temperature.

What is an isotope?

View GCSE Chemistry tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok