Question

(d) When rubidium is added to cold water a reaction occurs.
(1) Suggest two observations that would be made when rubidium is added to cold water.
.. [2]
(11) What would be the colour of the solution if methyl orange was added to.n' e the reaction?
(11) Write a chemical equation for the reaction between rubidium and water.
[2]
(iv) Put the Group I elements, caeslum, lithium, potassium, rubidium and sodium in their order
of reactivity with water. Put the most reactive element first.
least reactive
most reactive​

Answer 1

Answer:

Rubidium metal reacts very rapidly with water to form a colourless solution of rubidium hydroxide (RbOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide.