The given sample of hydrochloric acid contains only 20% by weight of HCl, the rest being water.What mass of the acid will be required for reacting completely with 20 g of magnesium oxide?

36.5 g

No worries! We‘ve got your back. Try BYJU‘S free classes today!

182.5 g

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

91.25 g

No worries! We‘ve got your back. Try BYJU‘S free classes today!

73 g

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
182.5 g

$M g O 24 + 16 + 2 H C l 2 (1 + 35.5) \to M g C l_{2} + H_{2} O$
40 g of MgO requires 73 g of HCl.

20 g of MgO will require = $\frac{73}{40} \times 20$

= 36.5 g of HCl

But the given acid is 20% i.e., 20 g of HCl is contained in 100 g sample.

36.5 g of HCl is contained in $\frac{100}{20} \times 36.5 g$ of HCl = 182.5 g of HCl.

Suggest Corrections

Similar questions

320

mg of a sample of magnesium having a coating of its oxide required

20

ml of

0.1

m hydrochloric acid for the complete neutralisation of the letter. The composition of the sample is:

Most commercial hydrochloric acid is prepared by heating NaCl with concentrated $H_{2} S O_{4}$ . How much sulphuric acid containing $90.0 %$ $H_{2} S O_{4}$ by mass is needed for the production of 200 kg of conc. HCl containing $42.0 %$ HCl by mass?

Q. Generally commercial hydrochloric acid is prepared by heating

N a C l

with concentrated

H_{2} S O_{4}

. How much

H_{2} S O_{4}

solution containing 96 %

H_{2} S O_{4}

by mass is required for the production 1000 kg of concentrated hydrochloric acid containing 43.8 %

H C l

by weight)?

Q. Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water.what mass of oxygen gas would be required to react completely with 3g of hydrogen

Q. Dilute hydrochloric acid reacts with magnesium ribbon:

Join BYJU'S Learning Program

The given sample of hydrochloric acid contains only 20% by weight of HCl, the rest being water.What mass of the acid will be required for reacting completely with 20 g of magnesium oxide?

The correct option is B 182.5 g MgO24+16+2HCl2(1+35.5)→MgCl2+H2O 40 g of MgO requires 73 g of HCl. 20 g of MgO will require = 7340×20 = 36.5 g of HCl But the given acid is 20% i.e., 20 g of HCl is contained in 100 g sample. 36.5 g of HCl is contained in 10020×36.5g of HCl = 182.5 g of HCl.