Best answer answer
5m hcl in 50ml reacts with 5g mno₂. calculate the mass of mncl₂ and volume of cl₂.

The answer to your question is:

a) 1.12 l of Cl2

b) 6.3 g of MnCl2

Explanation:

Reaction

                   4HCl + MnO2 ⇒  Cl2 + 2H2O + MnCl2

Data

HCl 5M, 50 ml (0.05 l)

MnO2 = 5 g

MW MnO2 = 87 g

MW MnCl2 = 126 g

Process

For HCl

M = n/V

n = MV

n = 5(0.05) = 0.25 moles     from the reaction 4(0.05) = 1 mol of HCl

For MnO2

                        87 g 1 mol

                           5 g   x

                         x = 5/87 = 0.05 mol of MnO2

The proportion in the reaction HCl to MnO2 is 4:1 but from the operations,  

1: 0.05, the from this we see that MnO2 is the limiting reactant, and we take MnO2 to obtain the values of the questions.

a)  From the reaction        1 mol of MnO2 1 mol of Cl2

                                          0.05 mol               x

                                          x = 0.05 moles of Cl2

                        1 mol of Cl2  22.4 l

                        0.05 moles       x

           x = 0.05 x 22.4/1 = 1.12 l

b) From the reaction        1 mol of MnO2 1 mol of MnCl2

                                        0.05 mol of MnO2   x

                                        x = 0.05 moles of MnCl2

                                        1 mol of MnCl2  126 g of MnCl2

                                       0.05 mol of MnCl2    x

                        x = 0.05 x 126 = 6.3 g

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.