To investigate the effect of changing various factors on the rate of a reaction, Kayla placed a conical flask onto a scale at room temperature and added 5.0g of Magnesium strip followed by excess hydrochloric acid. (a) Kayla repeated her experiment using 5.0g of Magnesium powder instead of the strip. What effect would you expect this to have on the rate of the reaction, (Increase or
decrease)? Explain your answer.

Effect:

Explanation:

(b) Kayla repeated her experiment again at 40°C, instead of room temperature. What effect would you expect this to have on the rate of the reaction. (Increase or decrease)? Explain your answer.

Effect:

Explanation:

(c) Kayla repeated her experiment again using a lower concentration of hydrochloric acid. What effect would you expect this to have on the rate of the reaction. (Increase
or decrease)? Explain your answer.

Effect:

Explanation:​

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2