Answer all the questions 1
An acid of volume 11.30 cm' containing 5.3 g of HCI per dm' reacted with 25.0 cm of
a base containing Yg of NaOH per dm.
The equation for the reaction is:
HCl ад)
NaOH
(aq)
NaCl(aq)
El
+ 1₂
lyn
From the information provided, calculate the:
concentration of the base in mod dm?,
value of Y:
mass of NaCl formed during the reaction.
(H = 1.0, 0 = 16.0, Na = 23.0, CI = 35.51
methyl
(b)
State the indicator that can best be used for the titration.
Sta the colour of the indicator at the end-point.
How to solve it

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

thats how its supposed to be