Which chemical equation models a synthesis reaction A. HCl + Lioh - Licl +H2o
B. CO2 - C+ O2
C. 2Na + MgCI2 - 2NaCI +Mg
D. H2O +CO2 - H2CO3

the correct answer is a

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.