Three drops of a 1.0 mol dm-3 solution of NaOH are added to 20 cm3 of a solution of pH 8.4. The pH of the resulting solution will?

godstamtam

7 years ago

The answer should be C
Any substance with ph of above 7 is alkaline nd NaOH is also alkaline.... So the addition of alkaline to alkaline should increase the level of alkalinity
dats my own idea

MaraeX

8 years ago

Hey..

The answer z C..

Plzz correct naa

DrUche

6 years ago

With much already said, let me just add that Option C is very Correct!

Since NaOH is a strong base with a pH between 10 to 12 and 20cm3 of a solution of 8.4 is a weak base.
Therefore when 3 drops of NaOH are added the pH is greater than 8.4, therefore, it will migrate from a weak base to strong base.
Therefore the answer is C.

#Copied but still correct.

favourinchrist

5 years ago

haha
the answer na C

Ebukaezeigbo

4 years ago

Since NaOH is a strong base with a pH between 10 to 12 and 20cm3 of a solution of 8.4 is a weak base. Therefore when 3 drops of NaOH are added the pH is greater than 8.4, therefore, it will migrate from a weak base to strong base. Therefore the answer is C.

Allsaint

10 years ago

1.0 mol dm-3 solution of NaOH are added to 20cm3 of a solution of pH 8.4(basic).NaOH is basic,hence overall pH will be greater than 8.4

smally123

11 years ago

NA WU DEY WORK ALL DIS ANSWRS

Bullus

3 years ago

Since NaOH is a strong base with a pH between 10 to 12 and 20cm3 of a solution of 8.4 is a weak base.
Therefore when 3 drops of NaOH are added the pH is greater than 8.4, therefore, it will migrate from a weak base to strong base.

drakesimon40

4 years ago

how can you add a strong base to weak base and still expect the resulting solution to reduce

gluguyj

11 years ago

my school eeeh kpacharanya gi

Somto042

5 years ago

The correct answer is c because there was an increase in alkalinity of the system

egbonjosh

8 years ago

d correct ans is c

Repq

4 years ago

Some answers in myschool are not encouraging
Imagine their answer saying that when a strong base is added to a basic solution the pH will decrease
That is very incorrect because the base will increase the pH further.

Nicksholda

10 years ago

The 1mole/dm3 of NaOH is less concentrated and has more water molecules. So when added to 20cm3 of the other solution it reduces it's PH value.

Queenullo

7 years ago

i go with A... when NaOH is added to solution with ph 8.4

NaOH=Na+ + OH-

i adds OH to the sample
and as the pOH increases the pH decreases

so the solution with 8.4 pH decreases to almost 7(neutral or pure water)