OpenStudy (anonymous):

Write the formulas of the compounds formed by specified cations with the following anions: OH-, ClO3-, SO3^2-, HPO4^2-. Express your answers as chemical formulas separated by commas. Use the given order of anions. 1)NH4+ 2)Al^3+ 3)Pb^4+

OpenStudy (thomaster):

$$\bf\Huge Welcome~to~\color{#00B4ff}{Open}\color{#7cc517}{Study}~!!!$$ First one would be $$\sf NH_4OH$$ what do you think $$\sf NH_4^++~ClO_3^-=\ ?$$

OpenStudy (thomaster):

You have to look at the charge of the anions and cations For example Pb is 4+ and OH is 1- The overal charge needs to be 0 so you would need 4x (OH) to make the overal charge 0. So the formula is $$\sf Pb(OH)_4$$