Imagine you are in a laboratory. you are exploring the following reaction: a + b → c when the product c is created, bubbles form. when 10ml of a is added to 10ml of b, the reaction takes twenty seconds. your teacher gives you three unknown substances (x, y, and z), one of which is a catalyst for the reaction. design an experiment to test substances x, y, and z to determine which one is a catalyst for the reaction.

Ok so in this experiment what we want to find is the catalyst for the reaction. Our original reaction is the following. A + B --> C, therefore to find which of the unknown substances (X, Y, and Z) is the catalyst reaction we simply have to do the following:

A + B + X --> C

A + B + Y --> C

A + B + Z --> C

The reaction that produces C much faster than our original reaction A + B --> C will be our catalyst. The reason being that one of the substances will increase the rate of the chemical reaction.

I hope it helps, Regards.

Prepare three test tubes containing reactant A.

Prepare three test tubes containing reactant B.

Add one test tube of reactant B and one unknown to one test tube of reactant A. Repeat for the other two unknowns.

Time the reaction until bubbling stops.

The unknown that causes the reaction to occur the quickest is the catalyst.

I took the test

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.