Question 16 (2 points)
the following is what type of reaction? .
mg(oh)2 + h2so4 --> mgso4 + 2h20
odecomposition
synthesis
double displacement
single displacement
question 17 (3 points)

double displacement reaction

(Acid- base)

Explanation:

Double Displacement Reaction : The reaction in which the anion and cations of two different salts exchange their position to form new products.

Here ,

Mg2+ is exhanged by H+   to form H2O

SO4 2- by OH-                     to form H2O

H+ is exhanged by Mg+      to form MgSO4

OH- by SO4 (2-)                   to form MgSO4

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6