Solution of task 402 of Chemistry Book Shimanovich 2003

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402. Dioxides of titanium and zirconium during fusion interact with alkalis. What properties of oxides do these reactions say? Write the reaction equations between:
a) TiO3 and BaO;
b) ZrO2 and NaOH.
In the first reaction, metatitanate is formed, and in the second reaction, orthosirconate of the corresponding metals